| ZIP Codes: | 32 ZIP Codes (26 Standard, 6 PO Box, 0 Unique) [See All] |
| Area Codes: | 214 / 430 / 469 / 903 / 940 / 945 / 972 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:52 PM |
| Population: | 1,115,497 [See All] |
| FIPS: | 48085 |
| CBSA: | Dallas-Fort Worth-Arlington, TX |
| Land Area: | 878 sq mi |
| Water Area: | 46 sq mi |
| Coordinates: | 33.1332, -96.6265 |
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1,115,497 residents live across 32 ZIPs covering 878 sq mi, served by 19 distinct USPS-recognized cities.
Population moved from 808,077 to 1,060,410 from 2014 to 2024 — a +31.2% change. 24 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 75078 (Prosper, $196,564 median) and poorest ZIP 75287 (Dallas, $63,741) are 17.0 miles apart — a 3.1× income gap across local geography.
Median home values vary 2.3× across this county — from $312,300 in 75424 (Blue Ridge) to $732,300 in 75078 (Prosper).
Density varies 168× across the county — from 59 people/sq mi in 75424 (Blue Ridge) to 9,878 in 75287 (Dallas).
Educational attainment ranges from 20.0% bachelor's+ in 75442 (Farmersville) to 72.3% in 75024 (Plano) — the breadth of educational profiles across the area.
Within Texas, this is the #6 most populous of 254 counties and ranks #4 for median household income with the #13 fastest decade growth .
On the national stage, Collin County is the #42 most populous US county , ranks #88 for income , and #32 for decade growth .
Weighted by population, the typical household earns about $127,630 across the county — reflecting what a typical resident sees, not a simple ZIP average.
55.5% of adults age 25+ hold a bachelor's degree or higher (414,395 of 746,143 reporting). The most-educated ZIPs cluster around Plano.
26 Standard delivery, 6 PO Box only, 0 single-entity Unique ZIPs serve this county.
9 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Median household income spans 3.1× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Collin County grew 38.0% over the past decade — concentrated in 5 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 75035 | Frisco | Standard | 89,682 | $166,590 | 25.2 | 67.3% |
| 75002 | Allen | Standard | 75,057 | $137,037 | 39.6 | 12.6% |
| 75071 | Mckinney | Standard | 72,964 | $132,447 | 76.8 | 77.5% |
| 75098 | Wylie | Standard | 69,325 | $122,089 | 41.2 | 39.8% |
| 75070 | Mckinney | Standard | 64,078 | $112,352 | 12.5 | -22.0% |
| 75072 | Mckinney | Standard | 55,087 | $165,682 | 11.6 | — |
| 75287 | Dallas | Standard | 53,959 | $63,741 | 5.5 | 5.5% |
| 75074 | Plano | Standard | 53,831 | $88,697 | 16.1 | 13.5% |
| 75025 | Plano | Standard | 53,202 | $143,260 | 9.6 | 0.8% |
| 75078 | Prosper | Standard | 53,011 | $196,564 | 31.3 | 300.7% |
| 75013 | Allen | Standard | 49,796 | $146,891 | 14.8 | 46.9% |
| 75023 | Plano | Standard | 49,229 | $109,660 | 9.2 | 6.0% |
| 75093 | Plano | Standard | 47,954 | $124,563 | 14.2 | -0.6% |
| 75024 | Plano | Standard | 45,652 | $117,088 | 13.0 | 14.6% |
| 75069 | Mckinney | Standard | 40,032 | $85,327 | 34.3 | 13.3% |
| 75075 | Plano | Standard | 38,135 | $98,365 | 9.7 | 11.0% |
| 75009 | Celina | Standard | 34,260 | $168,250 | 103.2 | 272.6% |
| 75407 | Princeton | Standard | 34,171 | $100,037 | 65.1 | 126.0% |
| 75252 | Dallas | Standard | 28,618 | $85,000 | 5.1 | 12.3% |
| 75409 | Anna | Standard | 27,131 | $104,814 | 79.8 | 124.7% |
| 75094 | Plano | Standard | 24,200 | $171,476 | 7.1 | 12.3% |
| 75454 | Melissa | Standard | 22,990 | $138,827 | 18.5 | 255.3% |
| 75442 | Farmersville | Standard | 10,805 | $95,250 | 115.3 | 8.5% |
| 75173 | Nevada | Standard | 10,664 | $101,988 | 38.6 | 130.9% |
| 75166 | Lavon | Standard | 6,989 | $132,101 | 16.0 | 93.8% |
| 75424 | Blue Ridge | Standard | 3,790 | $89,157 | 64.5 | 3.9% |
| 75164 | Josephine | PO Box | 885 | $65,825 | 0.0 | 58.9% |
| 75121 | Copeville | PO Box | — | — | 0.0 | — |
| 75026 | Plano | PO Box | — | — | 0.0 | — |
| 75086 | Plano | PO Box | — | — | 0.0 | — |
| 75097 | Weston | PO Box | — | — | 0.0 | — |
| 75485 | Westminster | PO Box | — | — | 0.0 | — |