| ZIP Codes: | 10 ZIP Codes (5 Standard, 4 PO Box, 1 Unique) [See All] |
| Area Code: | 936 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:14:01 PM |
| Population: | 52,590 [See All] |
| FIPS: | 48373 |
| Land Area: | 1,126 sq mi |
| Water Area: | 53 sq mi |
| Coordinates: | 30.7635, -94.8511 |
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52,590 residents live across 10 ZIPs covering 1,126 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 45,445 to 52,590 from 2014 to 2024 — a +15.7% change. 7 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 77351 (Livingston, $66,834 median) and poorest ZIP 75939 (Corrigan, $46,014) are 22.7 miles apart — a 1.5× income gap across local geography.
Median home values vary 2.1× across this county — from $94,600 in 77350 (Leggett ) to $199,700 in 77351 (Livingston).
Density varies 6× across the county — from 18 people/sq mi in 75960 (Moscow) to 105 in 77360 (Onalaska).
Educational attainment ranges from 13.4% bachelor's+ in 75939 (Corrigan) to 21.0% in 77335 (Goodrich) — the breadth of educational profiles across the area.
Within Texas, this is the #63 most populous of 254 counties and ranks #192 for median household income with the #38 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 77399Escapees Rv Club .
Weighted by population, the typical household earns about $63,458 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.0% of adults age 25+ hold a bachelor's degree or higher (6,126 of 38,176 reporting).
5 Standard delivery, 4 PO Box only, 1 single-entity Unique ZIPs serve this county.
Polk County grew 15.7% over the past decade — concentrated in 2 high-growth ZIPs:
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 77351 | Livingston | Standard | 37,143 | $66,834 | 712.5 | 13.6% |
| 77360 | Onalaska | Standard | 6,223 | $60,402 | 59.5 | 28.1% |
| 75939 | Corrigan | Standard | 4,725 | $46,014 | 245.2 | 9.0% |
| 77335 | Goodrich | Standard | 2,468 | $53,300 | 37.0 | -3.9% |
| 75960 | Moscow | Standard | 1,304 | $64,300 | 71.2 | 57.3% |
| 77350 | Leggett | PO Box | 347 | — | 0.0 | 171.1% |
| 77326 | Ace | PO Box | 275 | — | 0.0 | 1618.8% |
| 75934 | Camden | PO Box | 105 | — | 0.0 | 250.0% |
| 77332 | Dallardsville | PO Box | — | — | 0.0 | — |
| 77399 | Livingston | Unique | — | — | 0.1 | — |