Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Asbury United Methodist Church of Pasadena | Church | 8 | Harris | 29 41 45 N | 095 11 36 W |
| ASC Heliport | Airport | 30 | Harris | 29 41 09 N | 095 27 23 W |
| Ascension Catholic Church | Church | 24 | Harris | 29 42 22 N | 095 35 34 W |
| Ash Lake | Lake | -3 | Harris | 29 41 04 N | 094 55 42 W |
| Ash Point | Cape | 5 | Harris | 29 40 58 N | 094 56 05 W |
| Ashbel Smith Elementary School | School | 11 | Harris | 29 44 04 N | 094 57 44 W |
| Ashford Church | Church | 25 | Harris | 29 44 31 N | 095 36 20 W |
| Ashford Elementary School | School | 24 | Harris | 29 44 52 N | 095 35 56 W |
| Ashford Elementary SPARK Park Trail | Trail | 24 | Harris | 29 44 52 N | 095 35 56 W |
| Asia Missionary Baptist Church | Church | 18 | Harris | 29 50 06 N | 095 18 50 W |
| Askew Elementary School | School | 24 | Harris | 29 45 09 N | 095 34 41 W |
| Askew Elementary SPARK Park Trail | Trail | 24 | Harris | 29 45 09 N | 095 34 41 W |
| Assembly Apostolic Church | Church | 19 | Harris | 29 48 35 N | 095 25 41 W |
| Assembly of God Churches | Church | 38 | Harris | 30 04 23 N | 095 26 23 W |
| Assembly of God in Katy Church | Church | 45 | Harris | 29 48 34 N | 095 49 17 W |
| Assembly Pentecostal Bethel Church | Church | 23 | Harris | 29 54 58 N | 095 22 04 W |
| Assumption Catholic Church | Church | 24 | Harris | 29 52 15 N | 095 23 10 W |
| Astroarena | Park | 16 | Harris | 29 40 54 N | 095 24 24 W |
| Astrodome | Building | 16 | Harris | 29 41 06 N | 095 24 27 W |
| Astrodome | Park | 16 | Harris | 29 41 06 N | 095 24 29 W |
| Atascocita | Populated Place | 22 | Harris | 29 59 56 N | 095 10 36 W |
| Atascocita Branch Library | Building | 131 | Harris | 32 23 40 N | 095 09 23 W |
| Atascocita Country Club | Locale | 19 | Harris | 30 00 37 N | 095 08 48 W |
| Atascocita Middle School | School | 13 | Harris | 30 01 20 N | 095 10 47 W |
| Atascocita United Methodist Church | Church | 20 | Harris | 30 00 15 N | 095 09 16 W |
| Atherton Elementary School | School | 14 | Harris | 29 46 46 N | 095 19 16 W |
| Atherton Elementary SPARK Park Trail | Trail | 14 | Harris | 29 46 46 N | 095 19 16 W |
| Atherton School | School | 14 | Harris | 29 46 47 N | 095 19 20 W |
| Athletics and Alumni Center | Park | 12 | Harris | 29 43 34 N | 095 20 49 W |
| Atkinson Elementary School | School | 14 | Harris | 29 36 34 N | 095 14 27 W |