Dallam County, Texas
Updated · Data: U.S. Census Bureau
Dallam County, Texas has its county seat in Dalhart and FIPS code 48111. About 7,180 people live here, the 183rd most populated of the 254 Texas counties.
| County seat | Dalhart |
|---|---|
| FIPS code | 48111 (Texas 48 + county 111) · all Texas FIPS codes |
| Population | 7,180 (183rd of 254) |
| Land area | 1,503.4 sq mi (18th largest; + 1.8 sq mi water) |
| People per sq mi | 4.8 |
| Time zone | Central time (America/Chicago) |
| Median home value | $140,500 |
| Median property tax paid | $2,065 a year (about 1.47% of the median home value: our calculation, not an official rate) |
| Official website | www.dallam.org |
What counties border Dallam County?
Dallam County shares a border with 4 counties:
- Union County, NM
- Cimarron County, OK
- Hartley County
- Sherman County
What cities and towns are in Dallam County?
1 places with 1,000+ people have residents here; together they hold about 74% of the county's population. The rest live in smaller communities and rural areas.
| Place | Population | Residents in this county |
|---|---|---|
| Dalhart | 7,885 | 67.7% (also in other counties) |
CDP = census-designated place: a named community with no city government.
What ZIP codes are in Dallam County?
4 ZIP code areas with residents touch Dallam County; the ones marked * cross into another county.
Check an exact address with the address lookup, look up a ZIP code, or see how to confirm your county with official records.
Sources: Census TIGER/Line 2024 (boundary, area, neighbors); ACS 2019-2023 5-year (population, home value, taxes paid); Wikidata, CC0 (seat, website); timezone-boundary-builder (time zone). Data as of November 1, 2026. Not affiliated with any government agency.
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