Communities
- Asa, TX
- Ash Switch, TX
- Ash, TX
- Ashby, TX (Houston County)
- Ashby, TX (Matagorda County)
- Asherton, TX
- Ashland, TX
- Ashmore, TX
- Ashtola, TX
- Ashton, TX
- Ashwood, TX
- Asia, TX
- Aspermont, TX
- Atascocita, TX
- Atascosa, TX
- Ater, TX
- Athens, TX
- Atlanta, TX (Caldwell County)
- Atlanta, TX (Cass County)
- Atlas, TX
- Atlee, TX
- Atoy, TX
- Attoyac, TX
- Atwell, TX
- Aubrey, TX
- Auburn, TX
- Audelia, TX
- Audra, TX
- Augusta, TX
- Aurora, TX (Jefferson County)
- Aurora, TX (Wise County)
- Austin, TX (Matagorda County)
- Austin, TX (Travis County)
- Austinia, TX
- Austonia, TX
- Austonio, TX
- Austwell, TX
- Authon, TX
- Avalon, TX (Ellis County)
- Avalon, TX (Fisher County)
- Avant Prairie, TX
- Avaton, TX
- Averitt, TX
- Avery, TX
- Avinger, TX
- Avoca, TX
- Avondale, TX
- Awalt, TX
- Axtell, TX
- Ayr, TX