ZIP Codes of Upshur County, TX

Population & People
Population & People
Total Population
37,973
Household Income
Household Income
Median Income
$66,936
Housing
Housing
Total Housing Units
15,845
Business & Economy
Business & Economy
Total Businesses
542
Employment
Employment
Employment Rate
53.04%
Education
Education
Bachelor's Degree+
17.76%
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, 0 PO Box, 1 Unique) [See All]
Area Codes:430 / 903
Timezone:Central (GMT -06:00)
Local Time:2:14:03 PM
Population:37,973 [See All]
FIPS:48459
CBSA:Longview, TX
Land Area:593 sq mi
Water Area:14 sq mi
Coordinates:32.7071, -94.9201
Quick Link:
https://www.zip-codes.com/county/tx-upshur.asp
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Texas's #82 most populous county
37,973 residents across 6 ZIPs — #82 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Gilmer · 12,774 people
33.6% of county total
Highest Income
Diana · $80,967 median
1.2× county average
Largest Land Area
Gilmer · 190.8 sq mi
Spans the most ground
Fastest Growth
Diana · 45.5% (10-yr)
4,220 → 6,142 residents
Most Educated
Diana · 24.4% bachelor's+
952 of 3,894 adults 25+

Things worth knowing about Upshur County


37,973 residents live across 6 ZIPs covering 593 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 35,933 to 37,973 from 2014 to 2024 — a +5.7% change. 3 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 75640 (Diana, $80,967 median) and poorest ZIP 75645 (Gilmer, $57,438) are 11.5 miles apart — a 1.4× income gap across local geography.

Median home values vary 2.5× across this county — from $109,500 in 75755 (Big Sandy) to $272,600 in 75640 (Diana).

Density varies across the county — from 50 people/sq mi in 75755 (Big Sandy) to 73 in 75645 (Gilmer).

Most of the decade's growth concentrated around Gilmer — top growth ZIPs averaged +20.1% over the past ten years ( 75640 , 75644 and 75645 ).

Educational attainment ranges from 12.7% bachelor's+ in 75755 (Big Sandy) to 24.4% in 75640 (Diana) — the breadth of educational profiles across the area.

Within Texas, this is the #82 most populous of 254 counties and ranks #130 for median household income with the #86 fastest decade growth .

Hosts 1 single-entity Unique ZIP: 75797Stratigic Fulfilment .

Weighted by population, the typical household earns about $64,215 across the county — reflecting what a typical resident sees, not a simple ZIP average.

17.8% of adults age 25+ hold a bachelor's degree or higher (4,661 of 26,237 reporting).

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

Stories about Upshur 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
593
square miles
Avg density
64.0
people per sq mi
Population
37,973
across 6 ZIPs
Gilmer
190.8 sq mi
12,774 residents
Gilmer
141.6 sq mi
10,400 residents
Big Sandy
104.4 sq mi
5,244 residents

All ZIP Codes in Upshur County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
75644GilmerStandard12,774$57,633190.813.6%
75645GilmerStandard10,400$57,438141.61.2%
75640DianaStandard6,142$80,96792.245.5%
75755Big SandyStandard5,244$73,402104.4-12.6%
75683Ore CityStandard3,413$65,24064.3-18.5%
75797Big SandyUnique0.0

Adjacent & Nearby Counties