What county is Elgin, TX in?
Updated · Data: U.S. Census Bureau
Elgin, Texas is in 2 counties. Most residents (82.5%) live in the Bastrop County part; the rest live in Travis County. Elgin mailing addresses (ZIP codes named Elgin) also reach Lee County and Williamson County, so check your street.
Which counties do Elgin residents live in?
| County | Share of residents | Chart |
|---|---|---|
| Bastrop County | 82.5% (9,076 people) | |
| Travis County | 17.5% (1,920 people) |
How is Elgin's land split between counties?
| County | Share of land area | Chart |
|---|---|---|
| Bastrop County | 68.4% | |
| Travis County | 31.6% |
Inside Elgin, the county depends on the address: check your address privately. See all Texas cities in more than one county or look up another city.
Elgin at a glance
What ZIP codes are in Elgin?
1 ZIP codes use the name Elgin or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.
| ZIP | Post office name | County (land share) |
|---|---|---|
| 78621 | Elgin | Bastrop County 63%, Travis County 15%, Williamson County 14%, Lee County 9% |
About Bastrop County
County seat: Bastrop. FIPS code 48021. Population 102,370. All Bastrop County facts.
Towns near Elgin
- McDade: 9.8 mi away, Bastrop County
- Manor: 9.9 mi away, Travis County
- Camp Swift: 13 mi away, Bastrop County
- Pflugerville: 14 mi away, Travis County
- Hornsby Bend: 14 mi away, Travis County
- Garfield: 15 mi away, Travis County
Elgin has about 10,996 people. It is an incorporated city or town.
Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.
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