The largest county in Oklahoma
There are two right answers. By land area it is Osage County; by population it is Oklahoma County. Which one you want depends on what you meant by largest.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.
By land area
| Rank | Name | Land area | Population |
|---|---|---|---|
| 1 | Osage County | 2,247 sq mi | 46,794 |
| 2 | Texas County | 2,041 sq mi | 20,322 |
| 3 | McCurtain County | 1,851 sq mi | 30,744 |
| 4 | Cimarron County | 1,835 sq mi | 2,059 |
| 5 | Beaver County | 1,815 sq mi | 4,882 |
| 6 | Le Flore County | 1,589 sq mi | 50,196 |
| 7 | Pushmataha County | 1,396 sq mi | 10,807 |
| 8 | Pittsburg County | 1,306 sq mi | 43,320 |
| 9 | Woods County | 1,286 sq mi | 8,443 |
| 10 | Caddo County | 1,278 sq mi | 26,130 |
By population
| Rank | Name | Population | Density |
|---|---|---|---|
| 1 | Oklahoma County | 822,125 | 1,160 per sq mi |
| 2 | Tulsa County | 698,782 | 1,225 per sq mi |
| 3 | Cleveland County | 303,973 | 564 per sq mi |
| 4 | Canadian County | 187,189 | 209 per sq mi |
| 5 | Comanche County | 122,158 | 114 per sq mi |
| 6 | Rogers County | 102,197 | 151 per sq mi |
| 7 | Wagoner County | 93,263 | 166 per sq mi |
| 8 | Payne County | 83,889 | 122 per sq mi |
| 9 | Pottawatomie County | 75,102 | 95.3 per sq mi |
| 10 | Creek County | 74,967 | 78.9 per sq mi |
And the smallest
More on Oklahoma
Rebuilt from source data 30 August 2026. How these figures are produced.