Oklahoma County area

Population and density of Oklahoma County

The Census Bureau estimates that 822,125 people lived in Oklahoma County on July 1, 2025. That ranks #81 of 3,222 county equivalents nationally and #1 of 77 in Oklahoma. Since the April 1, 2020 estimates base of 796,550, the population has grown by 25,575 (+3.2%), compared with +4.1% for Oklahoma as a whole.

With 708.9 square miles of land, that is 1,160 people per square mile (448 per km²), placing Oklahoma County #158 nationally for density and #2 in Oklahoma. The median county equivalent has 47 people per square mile; the Oklahoma median is 28. Put another way, there are about 0.552 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Oklahoma County

20 incorporated places lie at least partly in Oklahoma County. Together they are home to 801,775 people (97.5%); the other 20,350 (2.5%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Oklahoma City city, with 544,374 residents in the county (the city extends into 3 other counties). Among places with at least 1,000 residents in 2020, Luther town grew fastest since then (+13.3%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Oklahoma County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Oklahoma County is a central county of the Oklahoma City, OK Metropolitan Statistical Area. Its 7 county equivalents have 1,512,813 residents on 5,511.8 square miles of land; Oklahoma County accounts for 12.9% of the land and 54.3% of the residents. By combined land it ranks #43 of 393 metropolitan areas, and #43 by population. It belongs to the Oklahoma City-Shawnee, OK Combined Statistical Area.

ZIP codes

55 ZIP Code Tabulation Areas have land in Oklahoma County; 52 of them have most of their land inside the county, and the others mainly cover neighboring areas.

73003730077300873012730137302073025730347304573049730547306673078730847309773102731037310473105731067310773108731097311073111731127311473115731167311773118731197312073121731227312773128731297313073131731327313473135731397314173142731457314973150731517315973162731697317974857

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Oklahoma County

Oklahoma County shares a land border with 5 county equivalents. It has more land than 1 of them. The largest neighbor is Lincoln County (952.4 mi²) and the smallest is Cleveland County (538.9 mi²). Together with its neighbors, Oklahoma County forms a block of 4,628.3 mi² of land, of which it holds 15.3%.

How big is Oklahoma County compared with U.S. states?

Oklahoma County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.5 times as much. Oklahoma’s county land could hold about 97 areas the size of Oklahoma County.

Another way to picture it: the same land area would fill a square about 26.6 miles (42.8 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Oklahoma County?

Oklahoma County has more land than 1,923 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Oklahoma County at #1,377 nationally by total area, 78 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 1.3%, compared with a national county-equivalent median of 1.2% — 0.2 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Oklahoma County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.