| ZIP Codes: | 7 ZIP Codes (6 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 405 / 572 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:54:45 PM |
| Population: | 50,281 [See All] |
| FIPS: | 40087 |
| CBSA: | Oklahoma City, OK |
| Land Area: | 542 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 35.0449, -97.4591 |
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50,281 residents live across 7 ZIPs covering 542 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 40,667 to 50,237 from 2014 to 2024 — a +23.5% change. 4 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 73093 (Washington, $96,719 median) and poorest ZIP 74831 (Byars, $58,750) are 27.9 miles apart — a 1.6× income gap across local geography.
Median home values vary 2.3× across this county — from $136,800 in 74831 (Byars) to $315,300 in 73093 (Washington).
Density varies 27× across the county — from 9 people/sq mi in 74831 (Byars) to 243 in 73065 (Newcastle).
Educational attainment ranges from 15.5% bachelor's+ in 74831 (Byars) to 36.5% in 73093 (Washington) — the breadth of educational profiles across the area.
Within Oklahoma, this is the #14 most populous of 78 counties and ranks #6 for median household income with the #2 fastest decade growth .
Weighted by population, the typical household earns about $85,277 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.2% of adults age 25+ hold a bachelor's degree or higher (9,245 of 33,951 reporting).
6 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
Mcclain County grew 23.6% over the past decade — concentrated in 2 high-growth ZIPs:
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 73010 | Blanchard | Standard | 21,521 | $90,110 | 185.8 | 17.7% |
| 73065 | Newcastle | Standard | 11,685 | $87,358 | 48.1 | 67.5% |
| 73080 | Purcell | Standard | 10,773 | $72,500 | 96.3 | 12.1% |
| 73093 | Washington | Standard | 3,767 | $96,719 | 56.9 | 29.2% |
| 73095 | Wayne | Standard | 1,748 | $77,232 | 71.6 | -18.3% |
| 74831 | Byars | Standard | 743 | $58,750 | 83.1 | -0.1% |
| 73031 | Dibble | PO Box | 44 | — | 0.0 | — |