Collin County, Texas
Updated · Data: U.S. Census Bureau
Collin County, Texas has its county seat in McKinney and FIPS code 48085. About 1,116,601 people live here, the 6th most populated of the 254 Texas counties.
| County seat | McKinney |
|---|---|
| FIPS code | 48085 (Texas 48 + county 085) · all Texas FIPS codes |
| Population | 1,116,601 (6th of 254) |
| Land area | 841.4 sq mi (186th largest; + 44.5 sq mi water) |
| People per sq mi | 1,327.1 |
| Time zone | Central time (America/Chicago) |
| Median home value | $447,600 |
| Median property tax paid | $7,432 a year (about 1.66% of the median home value: our calculation, not an official rate) |
| Official website | www.collincountytx.gov |
What counties border Collin County?
Collin County shares a border with 6 counties:
What cities and towns are in Collin County?
27 places with 1,000+ people have residents here; together they hold about 95% of the county's population. The rest live in smaller communities and rural areas.
| Place | Population | Residents in this county |
|---|---|---|
| Dallas | 1,299,553 | 4.0% (also in other counties) |
| Plano | 287,339 | 98.1% (also in other counties) |
| Frisco | 210,238 | 59.4% (also in other counties) |
| McKinney | 202,314 | 100.0% |
| Carrollton | 132,741 | 0.2% (also in other counties) |
| Richardson | 118,269 | 35.8% (also in other counties) |
| Allen | 107,684 | 100.0% |
| Wylie | 58,991 | 95.1% (also in other counties) |
| Prosper | 34,567 | 79.5% (also in other counties) |
| Sachse | 29,075 | 36.8% (also in other counties) |
| Celina | 27,141 | 91.8% (also in other counties) |
| Murphy | 21,001 | 100.0% |
| Anna | 20,975 | 100.0% |
| Princeton | 20,966 | 100.0% |
| Melissa | 17,497 | 100.0% |
| Royse City | 17,357 | 16.9% (also in other counties) |
| Fairview | 10,570 | 100.0% |
| Lucas | 8,040 | 100.0% |
| Parker | 5,776 | 100.0% |
| Lavon | 5,624 | 100.0% |
| Josephine | 4,498 | 100.0% |
| Farmersville | 3,851 | 100.0% |
| Lowry Crossing | 1,842 | 100.0% |
| Nevada | 1,292 | 100.0% |
| Seis Lagos (CDP) | 1,160 | 100.0% |
| Blue Ridge | 1,135 | 100.0% |
| Westminster (CDP) | 1,105 | 100.0% |
CDP = census-designated place: a named community with no city government.
What ZIP codes are in Collin County?
39 ZIP code areas with residents touch Collin County; the ones marked * cross into another county.
- 75002
- 75007*
- 75009*
- 75013
- 75023
- 75024*
- 75025
- 75033*
- 75034*
- 75035
- 75048*
- 75069
- 75070
- 75071
- 75072
- 75074
- 75075
- 75078*
- 75080*
- 75082*
- 75087*
- 75093*
- 75094
- 75098*
- 75164
- 75166
- 75173
- 75189*
- 75248*
- 75252*
- 75287*
- 75407
- 75409
- 75424*
- 75442*
- 75452*
- 75454
- 75491*
- 75495*
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.
FAQ
Frequently asked questions
What is the county seat of Collin County, Texas?
What is the FIPS code for Collin County?
What counties border Collin County?
How many people live in Collin County?
What time zone is Collin County in?
What is the largest city in Collin County?
Free · No signup · Private
Find your county now
Use your location, a city or a ZIP code. The check runs on your device; your location is never sent or stored.