Dual citizens are citizens of more than one state.  It also refers to citizenship status.

The concept of dual citizenship is widely accepted by many countries in America, Europe while in Asia and Africa it is less tolerant. The citizenship laws vary by country are quite complicated in terms of birth, marriage, naturalization and for children.   Some countries prohibit dual citizenship holders from serving in their militaries or on police forces or holding certain public offices.

Some countries such as Russia, South Africa require prior permission before becoming a dual citizen. China, India, Saudi Arabia, Bahrain, Malaysia, Japan, Singapore, UAE etc. are hostile towards dual citizenship.

Dual citizenship persons can travel with two passports, although this is common trend. For example US dual citizens are required to use US passports when crossing borders.

Here are the list of 163 countries, where dual citizenship is allowed and prohibited, as of 2018.

CountryDual citizenship
AfghanistanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
AlbaniaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
AlgeriaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
AndorraNot allowed. Automatic loss of citizenship of origin country.
AngolaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ArgentinaAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
ArmeniaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
AustraliaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
AustriaNot allowed. Automatic loss of citizenship of origin country, and the origin country is Party to Chapter 1 of the Strasbourg Convention.3
AzerbaijanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BahamasAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BahrainAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BangladeshNot allowed. Automatic loss of citizenship of origin country.
BarbadosAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BelarusAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BelgiumAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BelizeAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BeninAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BhutanNot allowed. Automatic loss of citizenship of origin country.
BoliviaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BotswanaNot allowed. Automatic loss of citizenship of origin country.
BrazilAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BruneiNot allowed. Automatic loss of citizenship of origin country.
BulgariaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
BurundiAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
CambodiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
CameroonNot allowed. Automatic loss of citizenship of origin country.
CanadaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ChadAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ChileAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ChinaNot allowed. Automatic loss of citizenship of origin country.
ColombiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ComorosAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
Congo Democratic RepublicNot allowed. Automatic loss of citizenship of origin country.
Congo RepublicAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
CroatiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
CubaNot allowed. Automatic loss of citizenship of origin country.
CyprusAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
DenmarkAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
DjiboutiAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
DominicaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
EcuadorAllowed. No automatic loss of citizenship of origin country. Renunciation of citizenship of origin country is only possible for persons who have acquired citizenship of the origin country by naturalisation.
EgyptAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
EritreaAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
EstoniaNot allowed. Automatic loss of citizenship of origin country.
EthiopiaNot allowed. Automatic loss of citizenship of origin country.
FijiAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
FinlandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
FranceAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GabonAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GambiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GeorgiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GermanyNot allowed. Automatic loss of citizenship of origin country.
GhanaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GreeceAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GrenadaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GuatemalaAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
GuineaNot allowed. Automatic loss of citizenship of origin country.
Guinea-BissauAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
GuyanaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
HaitiAllowed. No automatic loss of citizenship of origin country. Renunciation of citizenship of origin country is only possible for persons who have acquired citizenship of the origin country by naturalisation.
HondurasAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
HungaryAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
IcelandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
IndiaNot allowed. Automatic loss of citizenship of origin country.
IndonesiaNot allowed. Automatic loss of citizenship of origin country.
IranAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
IraqAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
IrelandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
IsraelAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ItalyAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
JamaicaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
JapanNot allowed. Automatic loss of citizenship of origin country.
JordanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
KazakhstanNot allowed. Automatic loss of citizenship of origin country.
KenyaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
KiribatiAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
KuwaitNot allowed. Automatic loss of citizenship of origin country.
KyrgyzstanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
LaosAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
LatviaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
LebanonAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
LesothoNot allowed. Automatic loss of citizenship of origin country.
LiberiaNot allowed. Automatic loss of citizenship of origin country.
LibyaNot allowed. Automatic loss of citizenship of origin country.
LiechtensteinAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
LithuaniaNot allowed. Automatic loss of citizenship of origin country.
LuxembourgAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MacedoniaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MadagascarNot allowed. Automatic loss of citizenship of origin country.
MalawiNot allowed. Automatic loss of citizenship of origin country.
MalaysiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MaldivesAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MaliAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MaltaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MauritaniaNot allowed. Automatic loss of citizenship of origin country.
MauritiusAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MexicoAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
MicronesiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MoldovaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MonacoNot allowed. Automatic loss of citizenship of origin country.
MongoliaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MontenegroAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MoroccoAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
MozambiqueAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
MyanmarNot allowed. Automatic loss of citizenship of origin country.
NamibiaAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
NauruAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
NepalNot allowed. Automatic loss of citizenship of origin country.
NetherlandsNot allowed. Automatic loss of citizenship of origin country, and the origin country is Party to Chapter 1 of the Strasbourg Convention, as well to the Second Protocol.4
NicaraguaAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
NigerAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
NigeriaAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
NorwayNorway allows dual citizenship effective from Jan 2019
OmanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
PakistanNot allowed. Automatic loss of citizenship of origin country.
PalauAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
PanamaAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
ParaguayAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
PeruAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
PhilippinesAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
PolandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
PortugalAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
QatarAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
RomaniaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
RussiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
RwandaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SamoaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SenegalNot allowed. Automatic loss of citizenship of origin country.
SerbiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SeychellesAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SingaporeAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SlovakiaNot allowed. Automatic loss of citizenship of origin country.
SloveniaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SomaliaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SpainNot allowed. Automatic loss of citizenship of origin country.
SudanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SurinameNot allowed. Automatic loss of citizenship of origin country.
SwazilandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SwedenAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SwitzerlandAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
SyriaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TaiwanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TajikistanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TanzaniaNot allowed. Automatic loss of citizenship of origin country.
ThailandNot allowed. Automatic loss of citizenship of origin country.
Timor-LesteAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TogoAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TongaAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
TunisiaAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
TurkeyAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TurkmenistanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
TuvaluAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
UgandaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
UkraineAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
UruguayAllowed No automatic loss of birthright citizenship of origin country, and renunciation of citizenship of origin country is not possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.
UzbekistanAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
VanuatuAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
VenezuelaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
VietnamAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
YemenAllowed. No automatic loss of citizenship of origin country, and renunciation of citizenship of origin country is not possible.
ZambiaAllowed. No automatic loss of citizenship of origin country, but renunciation of citizenship of origin country is possible.
ZimbabweAllowed. No automatic loss of birthright citizenship of origin country, but renunciation of citizenship of origin country is possible. Automatic loss of citizenship of origin country for persons who have acquired citizenship of origin country by naturalisation.

 

Source: MACMIDE dual citizenship database