- Abbott
- Abernathy
- Abilene
- Abram
- Ackerly
- Addison
- Adrian
- Agua Dulce
- Agua Dulce
- Aguilares
- Airport Road Addition
- Alamo
- Alamo Heights
- Alba
- Albany
- Aldine
- Aledo
- Alfred
- Alice
- Alice Acres
- Alief
- Allen
- Alma
- Alpine
- Alto
- Alto Bonito
- Alto Bonito Colonia
- Alton
- Alton North (historical)
- Alvarado
- Alvin
- Alvord
- Amargosa Colonia
- Amarillo
- Amaya Colonia
- Ames
- Ames
- Amherst
- Amistad Acres
- Anahuac
- Anderson
- Anderson Mill
- Andrews
- Angleton
- Angus
- Anna
- Annetta
- Annetta North
- Annetta South
- Annona
- Anson
- Anthony
- Anton
- Appleby
- Aquilla
- Aransas Pass
- Archer City
- Arcola
- Argyle
- Arlington
- Arp
- Arroyo Alto
- Arroyo Colorado Estates Colonia
- Arroyo Gardens
- Asherton
- Asherton
- Aspermont
- Atascocita
- Athens
- Atlanta
- Aubrey
- Aurora
- Austin
- Austwell
- Avery
- Avinger
- Azle
