ZIP Codes of Dallam County, TX

Population & People
Population & People
Total Population
11,648
Household Income
Household Income
Median Income
$70,710
Housing
Housing
Total Housing Units
4,361
Business & Economy
Business & Economy
Total Businesses
325
Employment
Employment
Employment Rate
58.63%
Education
Education
Bachelor's Degree+
15.66%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:3 ZIP Codes (2 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:806
Timezone:Central (GMT -06:00)
Local Time:11:55:13 PM
Population:11,648 [See All]
FIPS:48111
Land Area:2,621 sq mi
Water Area:3 sq mi
Coordinates:36.2527, -102.6053
Quick Link:
https://www.zip-codes.com/county/tx-dallam.asp
Need Dallam data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Texas's #156 most populous county
11,648 residents across 3 ZIPs — #156 of 254 Texas counties.

Standout ZIPs in this County


Most Populous
Dalhart · 10,826 people
92.9% of county total
Highest Income
Dalhart · $72,286 median
1.0× county average
Largest Land Area
Dalhart · 2,286.8 sq mi
Spans the most ground
Fastest Growth
Dalhart · -4.3% (10-yr)
11,308 → 10,826 residents
Most Educated
Dalhart · 14.8% bachelor's+
1,047 of 7,085 adults 25+

Things worth knowing about Dallam County


11,648 residents live across 3 ZIPs covering 2,621 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 12,140 to 11,648 from 2014 to 2024 — a -4.1% change. 1 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 79022 (Dalhart, $72,286 median) and poorest ZIP 79087 (Texline, $69,135) are 28.6 miles apart — a 1.0× income gap across local geography.

Median home values vary 1.7× across this county — from $102,600 in 79087 (Texline) to $172,000 in 79022 (Dalhart).

Density varies across the county — from 3 people/sq mi in 79087 (Texline) to 5 in 79022 (Dalhart).

Educational attainment ranges from 14.8% bachelor's+ in 79022 (Dalhart) to 28.0% in 79087 (Texline) — the breadth of educational profiles across the area.

Within Texas, this is the #156 most populous of 254 counties and ranks #98 for median household income .

Weighted by population, the typical household earns about $72,066 across the county — reflecting what a typical resident sees, not a simple ZIP average.

15.7% of adults age 25+ hold a bachelor's degree or higher (1,192 of 7,611 reporting).

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

Stories about Dallam 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
2,621
square miles
Avg density
4.4
people per sq mi
Population
11,648
across 3 ZIPs
Dalhart
2,286.8 sq mi
10,826 residents
Texline
259.0 sq mi
813 residents
Kerrick
74.9 sq mi
9 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.

Dalhart

All ZIP Codes in Dallam County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
79022DalhartStandard10,826$72,2862,286.8-4.3%
79087TexlineStandard813$69,135259.03.6%
79051KerrickPO Box974.9-80.9%

Adjacent & Nearby Counties