| ZIP Codes: | 8 ZIP Codes (5 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 580 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:26 PM |
| Population: | 38,817 [See All] |
| FIPS: | 40123 |
| CBSA: | Ada, OK |
| Land Area: | 840 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 34.7130, -96.6358 |
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38,817 residents live across 8 ZIPs covering 840 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 38,494 to 38,817 from 2014 to 2024 — a +0.8% change. 3 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 74843 (Fitzhugh, $73,750 median) and poorest ZIP 74844 (Francis, $54,250) are 16.5 miles apart — a 1.4× income gap across local geography.
Median home values vary 2.9× across this county — from $97,000 in 74844 (Francis) to $278,000 in 74843 (Fitzhugh).
Density varies 420× across the county — from 10 people/sq mi in 74843 (Fitzhugh) to 4,208 in 74844 (Francis).
Educational attainment ranges from 20.1% bachelor's+ in 74825 (Allen) to 52.9% in 74843 (Fitzhugh) — the breadth of educational profiles across the area.
Within Oklahoma, this is the #25 most populous of 78 counties and ranks #16 for median household income .
Weighted by population, the typical household earns about $62,964 across the county — reflecting what a typical resident sees, not a simple ZIP average.
30.2% of adults age 25+ hold a bachelor's degree or higher (7,743 of 25,622 reporting).
5 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
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.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 74820 | Ada | Standard | 31,943 | $62,357 | 288.7 | 2.2% |
| 74871 | Stonewall | Standard | 2,349 | $70,838 | 207.8 | 7.6% |
| 74865 | Roff | Standard | 1,894 | $65,000 | 159.5 | -6.6% |
| 74825 | Allen | Standard | 1,788 | $57,321 | 151.1 | -20.2% |
| 74844 | Francis | PO Box | 332 | $54,250 | 0.1 | -2.9% |
| 74843 | Fitzhugh | Standard | 324 | $73,750 | 32.3 | -3.0% |
| 74842 | Fittstown | PO Box | 187 | $97,900 | 0.0 | 50.8% |
| 74821 | Ada | PO Box | — | — | 0.0 | — |