- 12075 flags
- 2001 NAVA survey
- 2004 NAVA city flag survey
- 2022 NAVA City Flag Survey
- 2024 Fictional NAVA survey
- ASEAN
- A Coruña
- A Estrada
- A Guarda
- A Illa de Arousa
- A Laracha
- A Mezquita
- A Rúa
- A Teixeira
- Aargau
- Abadín
- Abai Region
- Abaigar
- Abaurregaina-Abaurrea Alta
- Abaurrepea-Abaurrea Baja
- Aberin
- Abkhazia
- Ablitas
- Aboriginal Australians
- Abreu e Lima
- Abruzzo
- Abu Dhabi
- Abárzuza-Abartzuza
- Acadia
- Acadiana
- Acklins
- Acre
- Acrelândia
- Adelaide, South Australia
- Adios
- Adjara
- Adjuntas, Puerto Rico
- Adrar Province
- Adrar Region
- Adygea
- Adélie Land
- Aerican Empire
- Afar Region
- Afghanistan
- Afghanistan flag in 1973
- Africa
- African American
- Agder
- Agua Blanca
- Aguascalientes
- Agui, Aichi
- Aguilar de Codés-Kodes
- Ahal
- Aibar-Oibar
- Aichi
- Ailuk Atoll
- Aimeliik
- Ainu
- Airai
- Aisai, Aichi
- Ajloun Governorate
- Ajman
- Akershus
- Akita
- Akrotiri and Dhekelia
- Akō
- Alabama
- Alagoas
- Alameda County, California
- Alaska
- Alawite
- Albania
- Albany, New York
- Alberta
- Albuquerque, New Mexico
- Alderney
- Alderson, West Virginia
- Alegre, Espírito Santo
- Alexeyevka
- Alfoz
- Algeria
- Algiers Province
- Alif Alif
- Allen, Texas
- Allin
- Allo
- Almirante Padilla
- Alofi
- Alor Setar
- Alpine County, California
- Altai Krai
- Altai Republic
- Alto Paraguay
- Alto Paraná
- Altsasu-Alsasua
- Ama, Aichi
- Amador County, California
- Amambay
- Amapá
- Amapá (city)
- Amazonas
- Amazonas (Brazil)
- Amazonas (Colombia)
- Amazonas (Peru)
- Amazonas (Venezuela)
- American Samoa
- Americas
- Americas Paralympic Committee
- Ames, Iowa
- Amescoa Baja-Ameskoabarrena
- Ametista do Sul
- Amman
- Amman Governorate
- Amsterdam
- Amur Oblast
- Anadyr
- Anaheim, California
- Anangu Pitjantjatjara Yankunytjatjara
- Ancash
- Anchorage, Alaska
- Ancín-Antzin
- Andalusia
- Andaman and Nicobar Islands
- Andhra Pradesh
- Andorra
- Andorra la Vella
- Andosilla
- Angaur
- Angelim
- Anglesey
- Angola
- Anguilla
- Anhui
- Anishinaabe
- Anjo, Aichi
- Anjouan
- Annaba Province
- Annapolis, Maryland
- Ansoáin-Antsoain
- Antarctica
- Antas de Ulla
- Anthony, Texas
- Antigua
- Antigua and Barbuda
- Antioquia
- Antofagasta
- Antwerp
- Anue
- Anzoátegui
- Aoiz-Agoitz
- Aomori
- Aosta Valley
- Apache Junction, Arizona
- Appendix: Good flags, bad flags
- Appendix: List of flag designers
- Appleton
- Apulia
- Apure
- Apurímac
- Aqaba Governorate
- Aragon
- Aragua
- Araitz
- Arakil
- Aranarache-Aranaratxe
- Aranguren
- Arano
- Arantza
- Arapaho
- Arapiraca
- Aras
- Arauca
- Araucanía
- Arbizu
- Arbo
- Arce-Artzi
- Archipelago of San Andrés, Providencia and Santa Catalina
- Ards and North Down
- Arellano
- Arendelle
- Arequipa (Department)
- Areso
- Argentina
- Argentine Antarctica
- Arica and Parinacota
- Arizona
- Arkansas
- Arkhangelsk Oblast
- Arlington County, Virginia
- Armenia
- Aromanian
- Arrowhead Park Early Collage High School
- Artigas Department
- Artsakh
- Aruba
- Arunachal Pradesh
- Ashgabat
- Ashmore and Cartier Islands
- Asia
- Asmara
- Assaba Region
- Assam
- Assis Brasil
- Associação Brasileira de Pirotecnia
- Assyrian
- Astrakhan Oblast
- Asturias
- Asunción
- Asyut, Egypt
- Asyut Governorate
- Atacama
- Atiu
- Atlanta
- Atlanta, Georgia
- Atlántico
- Attapeu province
- Auckland
- Augusta, Indianapolis
- Aurora, Colorado
- Austin, Texas
- Austral Islands
- Australia
- Australian Aboriginal
- Australian Antarctic Territory
- Australian Capital Territory
- Austria
- Autonomous Province of Western Bosnia
- Autonomous Region in Muslim Mindanao
- Autonomous region
- Auvergne-Rhône-Alpes
- Avilla, Indiana
- Avondale, Arizona
- Avondale, Cincinnati
- Ayacucho
- Aysén
- Azad Kashmir
- Azerbaijan
- Azores
- Azuay
- Aïn Defla Province
- Aïn Témouchent Province
- Añorbe
- Baden-Württemberg
- Bahamas
- Bahia
- Bahrain
- Baiona
- Baja California
- Baja California Sur
- Baker Island
- Bakersfield, California
- Baki, somaliland
- Baki District
- Baku
- Baku Economic Region
- Baldwin City, Kansas
- Balearic Islands
- Bali
- Balkan
- Balkh
- Balochistan
- Balochistan (Pakistan)
- Balqa Governorate
- Baltimore, Maryland
- Bamako
- Bangkok
- Bangladesh
- Bangsamoro
- Banská Bystrica Region
- Baralla
- Baranya County
- Barbados
- Barbuda
- Barcelona
- Barinas
- Bashkortostan
- Basilicata
- Basque Country
- Basseterre
- Batesville, Indiana
- Batken Oblast
- Batna Province
- Baton Rouge, Louisiana
- Bavaria
- Bay Islands Department
- Bear Island (Norway)
- Beech Grove, Indiana
- Beijing
- Beirut
- Bejuma
- Belarus
- Belfast
- Belgium
- Belgorod
- Belgorod Oblast
- Belgorodsky district
- Belize
- Bellingham, Washington
- Belo Monte
- Belém
- Belém, Alagoas
- Benguela
- Beni
- Benin
- Benson, Arizona
- Benton County, Indiana
- Benwood, West Virginia
- Bequia
- Berber
- Berlin
- Bermuda
- Berne, Indiana
- Bethlehem, Palestine
- Bhutan
- Biafra
- Bienville Parish, Louisiana
- Bihar
- Bikini Atoll
- Bilbao
- Billings, Montana
- Biobío
- Birmingham, Alabama
- Bisbee, Arizona
- Biscay
- Bishkek
- Biskra Province
- Bismarck, North Dakota
- Blenheim Reef
- Blida Province
- Bloomington, Indiana
- Bluey meets Pom Pom
- Boa Vista
- Boa Vista, Santa Catarina
- Boa Vista do Sul, Rio Grande do Sul
- Boca da Mata
- Bocas del Toro
- Bogotá (Capital District)
- Boise, Idaho
- Bokeo province
- Boké Region
- Bolikhamsai province
- Bolivar, West Virginia
- Bolivia
- Bolívar
- Bolívar (Colombia)
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