ZIP Codes of Trinity County, TX

Population & People
Population & People
Total Population
13,895
Household Income
Household Income
Median Income
$55,394
Housing
Housing
Total Housing Units
8,223
Business & Economy
Business & Economy
Total Businesses
198
Employment
Employment
Employment Rate
45.51%
Education
Education
Bachelor's Degree+
16.57%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:6 ZIP Codes (5 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:936
Timezone:Central (GMT -06:00)
Local Time:2:14:03 PM
Population:13,895 [See All]
FIPS:48455
Land Area:685 sq mi
Water Area:21 sq mi
Coordinates:31.1379, -95.1160
Quick Link:
https://www.zip-codes.com/county/tx-trinity.asp
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Texas's #141 most populous county
13,895 residents across 6 ZIPs — #141 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Trinity · 9,968 people
71.7% of county total
Highest Income
Apple Springs · $65,833 median
1.2× county average
Largest Land Area
Groveton · 290.5 sq mi
Spans the most ground
Fastest Growth
Apple Springs · 20.1% (10-yr)
1,157 → 1,389 residents
Most Educated
Groveton · 17.9% bachelor's+
351 of 1,965 adults 25+

Things worth knowing about Trinity County


13,895 residents live across 6 ZIPs covering 685 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 14,367 to 13,895 from 2014 to 2024 — a -3.3% change. 2 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 75926 (Apple Springs, $65,833 median) and poorest ZIP 75845 (Groveton, $48,333) are 12.7 miles apart — a 1.4× income gap across local geography.

Median home values vary 1.2× across this county — from $104,600 in 75845 (Groveton) to $130,400 in 75926 (Apple Springs).

Density varies across the county — from 9 people/sq mi in 75845 (Groveton) to 36 in 75862 (Trinity).

Educational attainment ranges from 15.8% bachelor's+ in 75862 (Trinity) to 19.4% in 75926 (Apple Springs) — the breadth of educational profiles across the area.

Within Texas, this is the #141 most populous of 254 counties and ranks #207 for median household income .

Weighted by population, the typical household earns about $52,746 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.6% of adults age 25+ hold a bachelor's degree or higher (1,687 of 10,183 reporting).

5 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Trinity 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
685
square miles
Avg density
20.3
people per sq mi
Population
13,895
across 6 ZIPs
Groveton
290.5 sq mi
2,473 residents
Trinity
278.9 sq mi
9,968 residents
Apple Springs
89.3 sq mi
1,389 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Trinity

All ZIP Codes in Trinity County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
75862TrinityStandard9,968$52,017278.918.1%
75845GrovetonStandard2,473$48,333290.5-46.9%
75926Apple SpringsStandard1,389$65,83389.320.1%
75856PenningtonStandard6526.4-43.5%
75865WoodlakePO Box00.0
75834CentraliaStandard0.0

Adjacent & Nearby Counties