The following lists standard demonyms for countries, Canadian provinces and territories, and U.S. states.
Afghanistan: Afghan
Albania: Albanian
Algeria: Algerian
American Samoa: American Samoan
Andorra: Andorran
Angola: Angolan
Anguilla: Anguillan
Antigua and Barbuda: Antiguan and Barbudan, Antiguan, Barbudan
Argentina: Argentine, Argentinian
Armenia: Armenian
Aruba: Aruban
Australia: Australian
Austria: Austrian
Azerbaijan: Azerbaijani, Azeri
The Bahamas: Bahamian
Bahrain: Bahraini
Bangladesh: Bangladeshi
Barbados: Barbadian, Bajan (colloquial)
Belarus: Belarusian
Belgium: Belgian
Belize: Belizean
Benin: Beninese, Beninois
Bermuda: Bermudian
Bhutan: Bhutanese
Bolivia: Bolivian
Bosnia and Herzegovina: Bosnian, Herzegovinian
Botswana: Botswanan
Brazil: Brazilian
British Virgin Islands: British Virgin Islander
Brunei: Bruneian
Bulgaria: Bulgarian
Burkina Faso: Burkinabé
Burma: Burmese
Burundi: Burundian
Cape Verde: Cabo Verdean, Cape Verdean
Cambodia: Cambodian
Cameroon: Cameroonian
Canada: Canadian
Cayman Islands: Caymanian
Central African Republic: Central African
Chad: Chadian
Chile: Chilean
China: Chinese
Christmas Islands: Christmas Islander
Colombia: Colombian
Comoros: Comoran, Comorian
Cook Islands: Cook Islander
Costa Rica: Costa Rican
Côte d’Ivoire: Ivorian
Croatia: Croatian
Cuba: Cuban
Curaçao: Curaçaoan
Cyprus: Cypriot
Czech Republic: Czech
Democratic Republic of the Congo: Congolese
Denmark: Dane, Danish
Djibouti: Djiboutian
Dominica: Dominican
Dominican Republic: Dominican
Ecuador: Ecuadorian
Egypt: Egyptian
El Salvador: Salvadoran
England: English, Briton
Equatorial Guinea: Equatorial Guinean, Equatoguinean
Eritrea: Eritrean
Estonia: Estonian
Eswatini: Swazi, liSwati (singular), emaSwati (plural)
Ethiopia: Ethiopian
Faroe Islands: Faroese
Federated States of Micronesia: Micronesian
Fiji: Fijian
Finland: Finn, Finnish
France: French
French Polynesia: French Polynesian
Gabon: Gabonese
The Gambia: Gambian
Gaza Strip: Gazan, Palestinian
Georgia: Georgian
Germany: German
Ghana: Ghanaian
Gibraltar: Gibraltarian
Greece: Greek, Hellene
Greenland: Greenlander
Grenada: Grenadian
Guam: Guamanian
Guatemala: Guatemalan
Guernsey: Channel Islander
Guinea: Guinean
Guinea-Bissau: Bissau-Guinean
Guyana: Guyanese
Haiti: Haitian
Honduras: Honduran
Hungary: Hungarian, Magyar
Iceland: Icelander
India: Indian
Indonesia: Indonesian
Iran: Iranian, Persian
Iraq: Iraqi
Ireland: Irish
Isle of Man: Manx
Israel: Israeli
Italy: Italian
Jamaica: Jamaican
Japan: Japanese
Jordan: Jordanian
Kazakhstan: Kazakhstani, Kazakh
Kenya: Kenyan
Kiribati: I-Kiribati
Kosovo: Kosovan
Kuwait: Kuwaiti
Kyrgyzstan: Kyrgyz, Kyrgyzstani
Laos: Lao, Laotian
Latvia: Latvian
Lebanon: Lebanese
Lesotho: Mosotho (singular), Basotho (plural)
Liberia: Liberian
Libya: Libyan
Liechtenstein: Liechtensteiner
Lithuania: Lithuanian
Luxembourg: Luxembourger, Luxembourgish
Madagascar : Malagasy
Malawi: Malawian
Malaysia: Malaysian
Maldives: Maldivian
Mali: Malian
Malta: Maltese
Marshall Islands: Marshallese
Martinique: Martinican, Martiniquais
Mauritania: Mauritanian
Mauritius: Mauritian
Mexico: Mexican
Moldova: Moldovan
Monaco: Monégasque, Monacan
Mongolia: Mongolian
Montenegro: Montenegrin
Morocco: Moroccan
Mozambique: Mozambican
Myanmar (Burma): Burmese, Myanma
Namibia: Namibian
Nauru: Nauruan
Nepal: Nepali, Nepalese
Netherlands: Dutch
New Zealand: New Zealander, Kiwi (colloquial)
Nicaragua: Nicaraguan
Niger: Nigerien
Nigeria: Nigerian
Niue: Niuean
North Korea: North Korean, Korean
North Macedonia: Macedonian
Northern Mariana Islands: Northern Mariana Islander, Chamorro (colloquial)
Norway: Norwegian
Oman: Omani
Pakistan: Pakistani
Palau: Palauan
Panama: Panamanian
Papua New Guinea: Papua New Guinean, Papuan
Paraguay: Paraguayan
Peru: Peruvian
Philippines: Filipino, Pinoy (colloquial)
Poland: Pole, Polish
Portugal: Portuguese
Puerto Rico: Puerto Rican
Qatar: Qatari
Republic of the Congo: Congolese
Romani: Romanian
Russia: Russian
Rwanda: Rwandan
Saint Kitts and Nevis: Kittitian, Nevisian
Saint Lucia: Saint Lucian
Saint Vincent and the Grenadines: Saint Vincentian, Vincentian
Samoa: Samoan
San Marino: Sammarinese
São Tomé and Príncipe: São Toméan, Príncipean, Santomean
Saudi Arabia: Saudi
Scotland: Scottish, Scots
Senegal: Senegalese
Serbia: Serb, Serbian
Seychelles: Seychellois
Sierra Leone: Sierra Leonean
Singapore: Singaporean
Slovakia: Slovak
Slovenia: Slovene
Solomon Islands: Solomon Islander, Solomonese
Somalia: Somali
South Africa: South African
South Korea: South Korean, Korean
South Sudan: South Sudanese
Spain: Spaniard
Sri Lanka: Sri Lankan
Sudan: Sudanese
Suriname: Surinamer
Sweden: Swede
Switzerland: Swiss
Syria: Syrian
Taiwan: Taiwanese
Tajikistan: Tajikistani, Tajik
Tanzania: Tanzanian
Thailand: Thai
Timor-Leste: Timorese
Togo: Togolese
Tonga: Tongan
Trinidad and Tobago: Trinidadian, Tobagonian
Tunisia: Tunisian
Turkey: Turk
Turkmenistan: Turkmen, Turkmenistani
Turks and Caicos Islands: Turks and Caicos Islander
Tuvalu: Tuvaluan
Uganda: Ugandan
Ukraine: Ukrainian
United Arab Emirates: Emirati
United Kingdom: Briton, British
United States of America: American
U.S. Virgin Islands: Virgin Islander
Uruguay: Uruguayan
Uzbekistan: Uzbek, Uzbekistani
Vanuatu: Ni-Vanuatu
Venezuela: Venezuelan
Vietnam: Vietnamese, Viet (colloquial)
Wales: Welsh
Wallis and Futuna: Wallisian, Futunan
Yemen: Yemeni
Zambia: Zambian
Zimbabwe: Zimbabwean
Alberta: Albertan
British Columbia: British Columbian
Manitoba: Manitoban
New Brunswick: New Brunswicker
Newfoundland and Labrador: Newfoundlander, Labradorian, Newfie (colloquial, sometimes pejorative)
Northwest Territories: Northwest Territorian
Nova Scotia: Nova Scotian, Bluenoser (colloquial)
Nunavut: Nunavummiuq (singular), Nunavummiut (plural)
Ontario: Ontarian
Prince Edward Island: Prince Edward Islander
Quebec: Quebecker, Québécois
Saskatchewan: Saskatchewanian
Yukon: Yukoner
Alabama: Alabamian
Alaska: Alaskan
Arizona: Arizonan
Arkansas: Arkansan, Arkie (colloquial)
California: Californian
Colorado: Coloradan
Connecticut: Connecticuter, Nutmegger (colloquial)
Delaware: Delawarean
D.C.: Washingtonian
Florida: Floridian
Georgia: Georgian
Hawaii: Hawaiian (native), Hawaii resident (non-native)
Idaho: Idahoan
Illinois: Illinoisan
Indiana: Hoosier
Iowa: Iowan
Kansas: Kansan
Kentucky: Kentuckian
Louisiana: Louisianian
Maine: Mainer
Maryland: Marylander
Massachusetts: Massachusettsan, Bay Stater
Michigan: Michiganian (official), Michigander (preferred), Yooper (colloquial, Upper Peninsula)
Minnesota: Minnesotan
Mississippi: Mississippian
Missouri: Missourian
Montana: Montanan
Nebraska: Nebraskan
New Hampshire: New Hampshirite
New Jersey: New Jerseyan
New Mexico: New Mexican
New York: New Yorker
North Carolina: North Carolinian, Tarheel (colloquial)
North Dakota: North Dakotan
Ohio: Ohioan
Oklahoma: Oklahoman, Okie (colloquial)
Oregon: Oregonian
Pennsylvania: Pennsylvanian
Rhode Island: Rhode Islander
South Carolina: South Carolinian
South Dakota: South Dakotan
Tennessee: Tennessean
Texas: Texan
Utah: Utahn
Vermont: Vermonter
Virginia: Virginian
Washington: Washingtonian
West Virginia: West Virginian
Wisconsin: Wisconsinite
Wyoming: Wyomingite