- 18th and Vine - Downtown East, Kansas City MO
- 27th Street Historic District Los Angeles CA
- 4th Street Corridor Long Beach CA
- Abell Baltimore MD
- Abram-Perezville TX
- Academy Gardens Philadelphia PA
- Academy St. Louis MO
- Acorn, Oakland, California Oakland CA
- Adair Park Atlanta GA
- Adams Point Oakland CA
- Addicks Houston TX
- Afton Oaks Houston TX
- Aiken's Tavern Historic District DE
- Airport Roanoke VA
- Alameda Portland OR
- Alamo Plaza Historic District San Antonio TX
- Alamo Square, San Francisco CA
- Alanton, Virginia Virginia Beach VA
- Albemarle-Kenmore Terraces Historic District Brooklyn NY
- Alewa Heights Honolulu HI
- Algiers LA
- Algiers Point New Orleans LA
- Alki Seattle WA
- Allandale, Austin, Texas Austin TX
- Allegheny Center Pittsburgh PA
- Allegheny West Philadelphia PA
- Allegheny West Pittsburgh PA
- Allen Hall Pittsburgh PA
- Allendale, Fremont, California Oakland CA
- Allentown Pittsburgh PA
- Allentown, Buffalo NY
- Allerton Bronx NY
- Allied Gardens, San Diego CA
- Allison Hill Harrisburg PA
- Allston-Brighton Boston MA
- Almeda Houston TX
- Alpha Terrace Historic District Pittsburgh PA
- Alphabet City, Manhattan New York NY
- Alta Vista, San Diego CA
- Altgeld Gardens Homes Chicago IL
- Alum Rock San Jose CA
- Alvarado Estates, San Diego CA
- Ambridge Mann Gary IN
- American University Park Washington D.C.
- Amity New Haven CT
- Anaheim Resort Anaheim CA
- Angel's Triangle, El Paso, Texas El Paso TX
- Angora Philadelphia PA
- Annadale New York NY
- Ansley Park Atlanta GA
- Anza Vista San Francisco CA
- Apremont Triangle Historic District Springfield MA
- Aquatic Park Historic District San Francisco CA
- Arbor Heights Seattle WA
- Arbor Hill, Albany, New York Albany NY
- Arbor Lodge Portland OR
- Arboretum Washington D.C.
- Archer Heights Chicago IL
- Archwood Avenue Historic District Cleveland OH
- Arden Heights New York NY
- Arden Indianapolis IN
- Ardens Historic District Ardentown DE
- Ardenwald-Johnson Creek Portland OR
- Arena District Columbus OH
- Argay Portland OR
- Argentine, Kansas Kansas City KS
- Arleta CA
- Arlington Forest Historic District VA
- Arlington Heights Los Angeles CA
- Arlington Heights Pittsburgh PA
- Arlington Heights Portland OR
- Arlington Mills Historic District Lawrence MA
- Arlington Pittsburgh PA
- Arlington, Staten Island NY
- Armatage Minneapolis MN
- Armistead Gardens Baltimore MD
- Armory Square Syracuse NY
- Armour Square Chicago IL
- Armour Villa, Yonkers NY
- Armourdale Kansas City KS
- Arnold Creek Portland OR
- Arrochar New York NY
- Arts District Dallas TX
- Arts District Honolulu HI
- Arts District Portland ME
- Arts District, Bakersfield CA
- Arts District, Los Angeles CA
- Arts District, Oklahoma City OK
- Arverne Queens NY
- Ashcreek Portland OR
- Ashland Commercial Historic District Ashland KY
- Ashmont Boston MA
- Ashtabula County Courthouse Group Jefferson OH
- Ashton-Sandy Spring MD
- Ashton-Woodenbridge Philadelphia PA
- Assembly Square Somerville MA
