Here's a comprehensive list of countries and their corresponding nationalities:
- Afghanistan - Afghan
- Albania - Albanian
- Algeria - Algerian
- Andorra - Andorran
- Angola - Angolan
- Antigua and Barbuda - Antiguan, Barbudan
- Argentina - Argentine
- Armenia - Armenian
- Australia - Australian
- Austria - Austrian
- Azerbaijan - Azerbaijani
- Bahamas - Bahamian
- Bahrain - Bahraini
- Bangladesh - Bangladeshi
- Barbados - Barbadian
- Belarus - Belarusian
- Belgium - Belgian
- Belize - Belizean
- Benin - Beninese
- Bhutan - Bhutanese
- Bolivia - Bolivian
- Bosnia and Herzegovina - Bosnian, Herzegovinian
- Botswana - Motswana (singular), Batswana (plural)
- Brazil - Brazilian
- Brunei - Bruneian
- Bulgaria - Bulgarian
- Burkina Faso - Burkinabé
- Burundi - Burundian
- Cabo Verde - Cape Verdean
- Cambodia - Cambodian
- Cameroon - Cameroonian
- Canada - Canadian
- Central African Republic - Central African
- Chad - Chadian
- Chile - Chilean
- China - Chinese
- Colombia - Colombian
- Comoros - Comorian
- Congo, Democratic Republic of the - Congolese
- Congo, Republic of the - Congolese
- Costa Rica - Costa Rican
- Croatia - Croatian
- Cuba - Cuban
- Cyprus - Cypriot
- Czech Republic - Czech
- Denmark - Danish
- Djibouti - Djiboutian
- Dominica - Dominican
- Dominican Republic - Dominican
- East Timor (Timor-Leste) - Timorese
- Ecuador - Ecuadorian
- Egypt - Egyptian
- El Salvador - Salvadoran
- Equatorial Guinea - Equatorial Guinean
- Eritrea - Eritrean
- Estonia - Estonian
- Eswatini - Swazi
- Ethiopia - Ethiopian
- Fiji - Fijian
- Finland - Finnish
- France - French
- Gabon - Gabonese
- Gambia - Gambian
- Georgia - Georgian
- Germany - German
- Ghana - Ghanaian
- Greece - Greek
- Grenada - Grenadian
- Guatemala - Guatemalan
- Guinea - Guinean
- Guinea-Bissau - Bissau-Guinean
- Guyana - Guyanese
- Haiti - Haitian
- Honduras - Honduran
- Hungary - Hungarian
- Iceland - Icelandic
- India - Indian
- Indonesia - Indonesian
- Iran - Iranian
- Iraq - Iraqi
- Ireland - Irish
- Israel - Israeli
- Italy - Italian
- Jamaica - Jamaican
- Japan - Japanese
- Jordan - Jordanian
- Kazakhstan - Kazakhstani
- Kenya - Kenyan
- Kiribati - I-Kiribati
- Korea, North - North Korean
- Korea, South - South Korean
- Kosovo - Kosovar
- Kuwait - Kuwaiti
- Kyrgyzstan - Kyrgyzstani
- Laos - Laotian
- Latvia - Latvian
- Lebanon - Lebanese
- Lesotho - Basotho (singular), Basotho (plural)
- Liberia - Liberian
- Libya - Libyan
- Liechtenstein - Liechtensteiner
- Lithuania - Lithuanian
- Luxembourg - Luxembourgish
- Madagascar - Malagasy
- Malawi - Malawian
- Malaysia - Malaysian
- Maldives - Maldivian
- Mali - Malian
- Malta - Maltese
- Marshall Islands - Marshallese
- Mauritania - Mauritanian
- Mauritius - Mauritian
- Mexico - Mexican
- Micronesia - Micronesian
- Moldova - Moldovan
- Monaco - Monegasque
- Mongolia - Mongolian
- Montenegro - Montenegrin
- Morocco - Moroccan
- Mozambique - Mozambican
- Myanmar (Burma) - Burmese
- Namibia - Namibian
- Nauru - Nauruan
- Nepal - Nepalese
- Netherlands - Dutch
- New Zealand - New Zealander
- Nicaragua - Nicaraguan
- Niger - Nigerien
- Nigeria - Nigerian
- North Macedonia - Macedonian
- Norway - Norwegian
- Oman - Omani
- Pakistan - Pakistani
- Palau - Palauan
- Palestine - Palestinian
- Panama - Panamanian
- Papua New Guinea - Papua New Guinean
- Paraguay - Paraguayan
- Peru - Peruvian
- Philippines - Filipino
- Poland - Polish
- Portugal - Portuguese
- Qatar - Qatari
- Romania - Romanian
- Russia - Russian
- Rwanda - Rwandan
- Saint Kitts and Nevis - Kittitian, Nevisian
- Saint Lucia - Saint Lucian
- Saint Vincent and the Grenadines - Vincentian
- Samoa - Samoan
- San Marino - Sammarinese
- Sao Tome and Principe - São Toméan
- Saudi Arabia - Saudi Arabian
- Senegal - Senegalese
- Serbia - Serbian
- Seychelles - Seychellois
- Sierra Leone - Sierra Leonean
- Singapore - Singaporean
- Slovakia - Slovak
- Slovenia - Slovenian
- Solomon Islands - Solomon Islander
- Somalia - Somali
- South Africa - South African
- South Sudan - South Sudanese
- Spain - Spanish
- Sri Lanka - Sri Lankan
- Sudan - Sudanese
- Suriname - Surinamese
- Sweden - Swedish
- Switzerland - Swiss
- Syria - Syrian
- Taiwan - Taiwanese
- Tajikistan - Tajikistani
- Tanzania - Tanzanian
- Thailand - Thai
- Togo - Togolese
- Tonga - Tongan
- Trinidad and Tobago - Trinidadian, Tobagonian
- Tunisia - Tunisian
- Turkey - Turkish
- Turkmenistan - Turkmen
- Tuvalu - Tuvaluan
- Uganda - Ugandan
- Ukraine - Ukrainian
- United Arab Emirates - Emirati
- United Kingdom - British
- United States of America - American
- Uruguay - Uruguayan
- Uzbekistan - Uzbekistani
- Vanuatu - Ni-Vanuatu
- Vatican City (Holy See) - Vatican Citizen
- Venezuela - Venezuelan
- Vietnam - Vietnamese
- Yemen - Yemeni
- Zambia - Zambian
- Zimbabwe - Zimbabwean