- 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
- Aa en Hunze
- Aargau
- Abadín
- Abai Region
- Abaigar
- Abaurregaina-Abaurrea Alta
- Abaurrepea-Abaurrea Baja
- Abbot Ice Shelf
- Abella de la Conca
- Abeokuta
- Aberdeen, South Dakota
- Aberin
- Abia State
- Abkhazia
- Ablitas
- Abrahamism Community
- Abrera
- Abruzzo
- Abu Dhabi
- Abyei Special Administrative Area
- Abárzuza-Abartzuza
- Acadia
- Acadiana
- Accra
- Acre
- Acrelândia
- Adamawa State
- Adelaide, South Australia
- Adelaide Island
- Adios
- Adjara
- Adjuntas, Puerto Rico
- Adrar Province
- Adrar Region
- Adygea
- Adélie Land
- Aerican Empire
- Afar Region
- Afghanistan
- Africa
- African American
- Agadez
- Agadez Region
- Agder
- Agrestina
- Agua Blanca
- Aguascalientes
- Agui, Aichi
- Aguilar de Codés-Kodes
- Aibar-Oibar
- Aichi
- Ailuk Atoll
- Aimeliik
- Ainu
- Airai
- Aisai, Aichi
- Ajigasawa, Aomori
- Ajman
- Akershus
- Akita
- Akita (city)
- Akrotiri and Dhekelia
- Akwa Ibom State
- Akō
- Alabama
- Alachua County, Florida
- Alagoas
- Alagoinha
- Alameda, California
- Alameda County, California
- Alaska
- Alawite
- Albania
- Albany, New York
- Alberta
- Albuquerque, New Mexico
- Alchevsk
- Alderney
- Alderson, West Virginia
- Alegre, Espírito Santo
- Aleksandrovskoye
- Alexander Island
- Alexeyevka
- Alfoz
- Alfredo Chaves
- Algeria
- Algiers Province
- Alif Alif
- Allen, Texas
- Allentown, Pennsylvania
- Allin
- Allo
- Almirante Padilla Municipality
- Alofi
- Alpine County, California
- Altai Krai
- Altai Republic
- Altsasu-Alsasua
- Ama, Aichi
- Amador County, California
- Amambay
- Amapá
- Amapá (municipality)
- Amazonas
- Amazonas (Brazil)
- Amazonas (Colombia)
- Amazonas (Peru)
- Amazonas (Venezuela)
- American Samoa
- Americas
- Americas Paralympic Committee
- Amery Ice Shelf
- Ames, Iowa
- Amescoa Baja-Ameskoabarrena
- Ametista do Sul
- Amman
- Amnat Charoen Province
- Amnesty International
- Amsterdam
- Amundsen Sea
- Amur Oblast
- Anadyr
- Anaheim, California
- Anangu Pitjantjatjara Yankunytjatjara
- Anapa
- Anarcho-Capitalism
- Ancapistan
- Ancash
- Anchorage, Alaska
- Ancín-Antzin
- Andalusia
- Andaman and Nicobar Islands
- Andhra Pradesh
- Andorra
- Andorra la Vella
- Andosilla
- Angarsk
- Angaur
- Angelim
- Anglesey
- Angola
- Anguilla
- Anhui
- Anishinaabe
- Anjo, Aichi
- Anjouan
- Annaba Province
- Annapolis, Maryland
- Anqing
- Anshun
- Ansoáin-Antsoain
- Anta Gorda
- Antarctic territorial claims
- Antarctica
- Antas de Ulla
- Anthony, Texas
- Antigua
- Antigua and Barbuda
- Antioquia
- Antique Province
- Antofagasta
- Antwerp
- Antwerp (district)
- Anue
- Anvers Island
- Anzoátegui
- Aoiz-Agoitz
- Aomori
- Aosta Valley
- Apache Junction, Arizona
- Aparecida
- Apopka, Florida
- Appendix: Good flags, bad flags
- Appenzell Innerrhoden
- Appling County, Georgia
- Aprelevka
- Apulia
- Apure
- Apurímac
- Arab, Alabama
- Aracena
- Aragon
- Aragua
- Araitz
- Arakil
- Aranarache-Aranaratxe
- Aranguren
- Arano
- Arantza
- Arapaho
- Arapiraca
- Araraquara
- Aras
- Arauca
- Araucanía
- Arbent
- Arbizu
- Arbo
- Arcadia, California
- Arce-Artzi
- Arcoverde
- Ards and North Down
- Areia Branca, Sergipe
- Arellano
- Arendelle
- Arequipa (Department)
- Areso
- Argentina
- Argentine Antarctica
- Arica and Parinacota
- Arima
- Arizona
- Arkansas
- Arkhangai Province
- Arkhangelsk Oblast
- Arlington County, Virginia
- Armavir
- Armenia
- Armenian American
- Arnhem
- Arno Atoll
- Aromanian
- Arroio dos Ratos
- Arrowhead Park Early College High School
- Artigas Department
- Artsakh
- Aruba
- Arunachal Pradesh
- Asbest
- Ascension Parish, Louisiana
- Ashanti
- Ashanti Region
- Ashgabat
- Ashmore and Cartier Islands
- Asia
- Asmara
- Assaba Region
- Assam
- Assen
- Assis Brasil
- Associação Brasileira de Pirotecnia
- Assyrian
- Astana
- Astrakhan Oblast
- Asturias
- Asunción
- Asyut, Egypt
- Asyut Governorate
- Atacama
- Atiu
- Atkinson County, Georgia
- Atlanta, Georgia
- Atlántico
- Attapeu province
- Auckland
- Auckland Islands
- Augusta, Georgia
- Augusta, Indianapolis
- Augusta, Kansas
- Augusta, Maine
- Aurora, Colorado
- Austin, Texas
- Austral Islands
- Australia
- Australian Aboriginal
- Australian Antarctic Territory
- Australian Capital Territory
- Austria
- Austria-Hungary
- Auvergne-Rhône-Alpes
- Avannaata
- Avilla, Indiana
- Avondale, Arizona
- Avondale, Cincinnati
- Avoyelles Parish, Louisiana
- Ayacucho
- Aysén
- Azad Kashmir
- Azerbaijan
- Azores
- Azuay
- Aïn Defla Province
- Aïn Témouchent Province
- Añorbe
- Aš
- BRICS
- Baarle-Hertog
- Bacon County, Georgia
- Baden-Württemberg
- Bady Bassit
- Bagua Province
- Bahamas
- Bahia
- Bahrain
- Baiona
- Baise
- Baiyin
- Baião, Pará
- Baja California
- Baja California Sur
- Bajo Nuevo Bank
- Baker County, Florida
- Baker County, Georgia
- Baker Island
- Baki District
- Baku
- Baldwin City, Kansas
- Baldwin County, Georgia
- Balearic Islands
- Bali
- Balkh
- Balleny Islands
- Balneário Camboriú
- Balochistan
- Balochistan (Pakistan)
- Baltimore, Maryland
- Banc du Geyser
- Bangalore
- Bangkok
- Bangladesh
- Bangor
- Bangsamoro
- Banks County, Georgia
- Banská Bystrica Region
- Banten
- Baralla
- Baralt Municipality
- Baranya County
- Barbados
- Barbuda
- Barcelona
- Barinas
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