| ZIP Codes: | 8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 512 / 737 / 830 / 979 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:50 PM |
| Population: | 108,116 [See All] |
| FIPS: | 48021 |
| CBSA: | Austin-Round Rock-San Marcos, TX |
| Land Area: | 1,024 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 30.1092, -97.3046 |
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108,116 residents live across 8 ZIPs covering 1,024 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 77,227 to 108,116 from 2014 to 2024 — a +40.0% change. 6 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 78621 (Elgin, $98,534 median) and poorest ZIP 78957 (Smithville, $69,149) are 25.4 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.4× across this county — from $248,600 in 78662 (Red Rock) to $349,700 in 78659 (Paige).
Density varies 21× across the county — from 10 people/sq mi in 78953 (Rosanky) to 204 in 78602 (Bastrop).
Educational attainment ranges from 15.6% bachelor's+ in 78662 (Red Rock) to 36.2% in 78659 (Paige) — the breadth of educational profiles across the area.
Within Texas, this is the #42 most populous of 254 counties and ranks #28 for median household income with the #12 fastest decade growth .
On the national stage, Bastrop County is and #30 for decade growth .
Weighted by population, the typical household earns about $91,296 across the county — reflecting what a typical resident sees, not a simple ZIP average.
26.0% of adults age 25+ hold a bachelor's degree or higher (18,570 of 71,515 reporting).
8 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 78602 | Bastrop | Standard | 38,190 | $89,968 | 187.1 | 50.1% |
| 78621 | Elgin | Standard | 30,411 | $98,534 | 188.3 | 36.4% |
| 78612 | Cedar Creek | Standard | 19,799 | $95,496 | 98.9 | 64.6% |
| 78957 | Smithville | Standard | 10,543 | $69,149 | 183.9 | 20.5% |
| 78662 | Red Rock | Standard | 3,015 | $94,005 | 69.1 | -1.1% |
| 78659 | Paige | Standard | 2,660 | $89,808 | 116.8 | -7.3% |
| 78650 | Mc Dade | Standard | 2,409 | $85,170 | 70.4 | 24.4% |
| 78953 | Rosanky | Standard | 1,089 | $83,438 | 109.8 | 26.5% |