ZIP Codes of Hamilton County, TX

Population & People
Population & People
Total Population
9,062
Household Income
Household Income
Median Income
$57,578
Housing
Housing
Total Housing Units
4,448
Business & Economy
Business & Economy
Total Businesses
251
Employment
Employment
Employment Rate
52.92%
Education
Education
Bachelor's Degree+
25.45%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:254 / 325 / 940
Timezone:Central (GMT -06:00)
Local Time:2:13:55 PM
Population:9,062 [See All]
FIPS:48193
Land Area:800 sq mi
Water Area:1 sq mi
Coordinates:31.7875, -98.1803
Quick Link:
https://www.zip-codes.com/county/tx-hamilton.asp
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Texas's #170 most populous county
9,062 residents across 4 ZIPs — #170 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Hamilton · 4,703 people
51.9% of county total
Highest Income
Hico · $72,238 median
1.3× county average
Largest Land Area
Hamilton · 381.8 sq mi
Spans the most ground
Fastest Growth
Hamilton · 3.0% (10-yr)
4,567 → 4,703 residents
Most Educated
Hico · 29.5% bachelor's+
860 of 2,912 adults 25+

Things worth knowing about Hamilton County


9,062 residents live across 4 ZIPs covering 800 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 9,312 to 9,062 from 2014 to 2024 — a -2.7% change. 2 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 76457 (Hico, $72,238 median) and poorest ZIP 76531 (Hamilton, $49,100) are 19.2 miles apart — a 1.5× income gap across local geography.

Median home values vary 2.1× across this county — from $126,300 in 76531 (Hamilton) to $264,100 in 76457 (Hico).

Density varies across the county — from 2 people/sq mi in 76436 (Carlton) to 13 in 76457 (Hico).

Educational attainment ranges from 10.5% bachelor's+ in 76436 (Carlton) to 29.5% in 76457 (Hico) — the breadth of educational profiles across the area.

Within Texas, this is the #170 most populous of 254 counties and ranks #196 for median household income .

Weighted by population, the typical household earns about $59,965 across the county — reflecting what a typical resident sees, not a simple ZIP average.

25.4% of adults age 25+ hold a bachelor's degree or higher (1,610 of 6,327 reporting).

4 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Hamilton County


Big & sparse

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.

Total area
800
square miles
Avg density
11.3
people per sq mi
Population
9,062
across 4 ZIPs
Hamilton
381.8 sq mi
4,703 residents
Hico
331.0 sq mi
4,244 residents
Carlton
48.3 sq mi
115 residents

All ZIP Codes in Hamilton County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
76531HamiltonStandard4,703$49,100381.83.0%
76457HicoStandard4,244$72,238331.0-7.8%
76436CarltonStandard115$51,39748.36.5%
76565PottsvilleStandard039.1-100.0%

Adjacent & Nearby Counties