| ZIP Codes: | 23 ZIP Codes (14 Standard, 8 PO Box, 1 Unique) [See All] |
| Area Codes: | 281 / 346 / 409 / 713 / 832 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:55 PM |
| Population: | 379,967 [See All] |
| FIPS: | 48167 |
| CBSA: | Houston-Pasadena-The Woodlands, TX |
| Land Area: | 489 sq mi |
| Water Area: | 64 sq mi |
| Coordinates: | 29.4122, -94.9104 |
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379,967 residents live across 23 ZIPs covering 489 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 322,893 to 379,965 from 2014 to 2024 — a +17.7% change. 14 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 77546 (Friendswood, $123,756 median) and poorest ZIP 77550 (Galveston, $45,047) are 28.0 miles apart — a 2.7× income gap across local geography.
Median home values vary 2.5× across this county — from $188,900 in 77590 (Texas City) to $466,800 in 77554 (Galveston).
Density varies 204× across the county — from 21 people/sq mi in 77650 (Port Bolivar) to 4,224 in 77551 (Galveston).
Educational attainment ranges from 12.4% bachelor's+ in 77650 (Port Bolivar) to 54.8% in 77554 (Galveston) — the breadth of educational profiles across the area.
Within Texas, this is the #16 most populous of 254 counties and ranks #52 for median household income with the #32 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 77555U Of T Med Br At Galveston .
Weighted by population, the typical household earns about $93,573 across the county — reflecting what a typical resident sees, not a simple ZIP average.
35.5% of adults age 25+ hold a bachelor's degree or higher (91,701 of 258,507 reporting).
14 Standard delivery, 8 PO Box only, 1 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 77573 | League City | Standard | 98,109 | $122,722 | 35.5 | 29.5% |
| 77546 | Friendswood | Standard | 54,789 | $123,756 | 29.4 | 9.6% |
| 77539 | Dickinson | Standard | 49,375 | $89,111 | 50.4 | 20.2% |
| 77590 | Texas City | Standard | 31,642 | $65,801 | 22.2 | 3.2% |
| 77550 | Galveston | Standard | 23,489 | $45,047 | 8.5 | 6.1% |
| 77568 | La Marque | Standard | 23,083 | $74,694 | 16.0 | 55.1% |
| 77551 | Galveston | Standard | 21,696 | $58,344 | 5.1 | 10.5% |
| 77591 | Texas City | Standard | 18,294 | $68,593 | 11.1 | 33.7% |
| 77510 | Santa Fe | Standard | 14,155 | $102,651 | 69.1 | -2.6% |
| 77554 | Galveston | Standard | 10,414 | $86,490 | 39.3 | 21.1% |
| 77563 | Hitchcock | Standard | 9,955 | $75,806 | 61.5 | 1.2% |
| 77518 | Bacliff | Standard | 9,541 | $51,458 | 3.8 | 10.1% |
| 77565 | Kemah | Standard | 6,943 | $95,268 | 4.8 | 14.1% |
| 77517 | Santa Fe | Standard | 5,529 | $88,567 | 20.4 | 3.2% |
| 77650 | Port Bolivar | PO Box | 2,322 | $61,745 | 111.9 | 90.2% |
| 77623 | High Island | PO Box | 585 | $88,375 | 0.1 | -11.2% |
| 77617 | Gilchrist | PO Box | 44 | $75,703 | 0.0 | -44.3% |
| 77555 | Galveston | Unique | 2 | — | 0.0 | — |
| 77592 | Texas City | PO Box | — | — | 0.0 | — |
| 77552 | Galveston | PO Box | — | — | 0.0 | — |
| 77553 | Galveston | PO Box | — | — | 0.0 | — |
| 77574 | League City | PO Box | — | — | 0.0 | — |
| 77549 | Friendswood | PO Box | — | — | 0.0 | — |