What county is Richardson, TX in?
Updated · Data: U.S. Census Bureau
Richardson, Texas is in 2 counties. Most residents (64.2%) live in the Dallas County part; the rest live in Collin County.
Which counties do Richardson residents live in?
| County | Share of residents | Chart |
|---|---|---|
| Dallas County | 64.2% (75,948 people) | |
| Collin County | 35.8% (42,321 people) |
How is Richardson's land split between counties?
| County | Share of land area | Chart |
|---|---|---|
| Dallas County | 63.9% | |
| Collin County | 36.1% |
Inside Richardson, the county depends on the address: check your address privately. See all Texas cities in more than one county or look up another city.
Richardson at a glance
What ZIP codes are in Richardson?
5 ZIP codes use the name Richardson 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) |
|---|---|---|
| 75080 | Richardson | Dallas County 71%, Collin County 29% |
| 75081 | Richardson | Dallas County |
| 75082 | Richardson | Collin County 85%, Dallas County 15% |
| 75083 | Richardson | Dallas County |
| 75085 | Richardson | Dallas County |
About Dallas County
County seat: Dallas. FIPS code 48113. Population 2,603,816. All Dallas County facts.
Towns near Richardson
- Plano: 5.9 mi away, Collin County
- Garland: 6.2 mi away, Dallas County
- Murphy: 6.5 mi away, Collin County
- Addison: 7.3 mi away, Dallas County
- Sachse: 7.5 mi away, Dallas County
- Parker: 7.8 mi away, Collin County
Richardson has about 118,269 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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