What county is Allen, TX in?
Updated · Data: U.S. Census Bureau
Allen, Texas is in Collin County.
Allen at a glance
How close is Allen to a county line?
The center of Allen (its Census internal point) is about 8.6 mi from the Dallas County line. Homes near the edge of town can be much closer; if you live near a line, check your address and the lookup will tell you how far you are from it.
What ZIP codes are in Allen?
2 ZIP codes use the name Allen or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.
| ZIP | Post office name | County (land share) |
|---|---|---|
| 75002 | Allen | Collin County |
| 75013 | Allen | Collin County |
About Collin County
County seat: McKinney. FIPS code 48085. Population 1,116,601. All Collin County facts.
Towns near Allen
- Fairview: 4.1 mi away, Collin County
- Parker: 4.4 mi away, Collin County
- Lucas: 5.3 mi away, Collin County
- Plano: 6.0 mi away, Collin County
- McKinney: 6.3 mi away, Collin County
- Seis Lagos: 6.7 mi away, Collin County
Allen has about 107,684 people. It is an incorporated city or town.
Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.
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What county is Allen, TX in?
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