ZIP Codes of Mcmullen County, TX

Population & People
Population & People
Total Population
599
Household Income
Household Income
Median Income
$37,917
Housing
Housing
Total Housing Units
314
Business & Economy
Business & Economy
Total Businesses
37
Employment
Employment
Employment Rate
45.55%
Education
Education
Bachelor's Degree+
19.12%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:361
Timezone:Central (GMT -06:00)
Local Time:2:13:59 PM
Population:599 [See All]
FIPS:48311
Land Area:856 sq mi
Water Area:16 sq mi
Coordinates:28.3486, -98.4726
Quick Link:
https://www.zip-codes.com/county/tx-mcmullen.asp
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Texas's #250 most populous county
599 residents across 2 ZIPs — #250 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Tilden · 403 people
67.3% of county total
Highest Income
Calliham · $38,636 median
1.0× county average
Largest Land Area
Tilden · 749.5 sq mi
Spans the most ground
Fastest Growth
— growth not calculable
Most Educated
— no education data

Things worth knowing about Mcmullen County


599 residents live across 2 ZIPs covering 856 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 593 to 599 from 2014 to 2024 — a +1.0% change. 1 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 78007 (Calliham, $38,636 median) and poorest ZIP 78072 (Tilden, $37,198) are 14.5 miles apart — a 1.0× income gap across local geography.

Median home values vary 1.0× across this county — from $80,000 in 78007 (Calliham) to $82,200 in 78072 (Tilden).

Density varies across the county — from 1 people/sq mi in 78072 (Tilden) to 2 in 78007 (Calliham).

Educational attainment ranges from 2.5% bachelor's+ in 78007 (Calliham) to 24.2% in 78072 (Tilden) — the breadth of educational profiles across the area.

Within Texas, this is the #250 most populous of 254 counties and ranks #252 for median household income .

Weighted by population, the typical household earns about $37,669 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.1% of adults age 25+ hold a bachelor's degree or higher (65 of 340 reporting).

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

Stories about Mcmullen 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
856
square miles
Avg density
0.7
people per sq mi
Population
599
across 2 ZIPs
Tilden
749.5 sq mi
403 residents
Calliham
106.0 sq mi
196 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.

Tilden

All ZIP Codes in Mcmullen County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
78072TildenStandard403$37,198749.5-29.5%
78007CallihamStandard196$38,636106.0833.3%

Adjacent & Nearby Counties