| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Canadian County | 1 | 20.52% | 187,336 | 155,445 |
| McClain County | 2 | 18.85% | 49,808 | 41,910 |
| Wagoner County | 3 | 14.42% | 93,139 | 81,401 |
| Bryan County | 4 | 10.82% | 51,339 | 46,328 |
| Logan County | 5 | 9.74% | 54,599 | 49,752 |
| Grady County | 6 | 7.89% | 59,213 | 54,884 |
| Rogers County | 7 | 7.41% | 102,474 | 95,405 |
| Marshall County | 8 | 6.4% | 16,320 | 15,339 |
| Kingfisher County | 9 | 5.59% | 16,025 | 15,177 |
| Lincoln County | 10 | 5.46% | 35,331 | 33,502 |
| Pawnee County | 11 | 4.95% | 16,330 | 15,560 |
| Coal County | 12 | 4.94% | 5,544 | 5,283 |
| Cherokee County | 13 | 4.66% | 49,285 | 47,092 |
| Tulsa County | 14 | 4.46% | 700,617 | 670,708 |
| McIntosh County | 15 | 4.22% | 19,750 | 18,950 |
| Sequoyah County | 16 | 4.11% | 40,862 | 39,249 |
| Le Flore County | 17 | 3.98% | 50,118 | 48,201 |
| Love County | 18 | 3.78% | 10,541 | 10,157 |
| Creek County | 19 | 3.78% | 74,570 | 71,857 |
| Atoka County | 20 | 3.61% | 14,676 | 14,165 |
| Payne County | 21 | 3.59% | 84,579 | 81,649 |
| Pottawatomie County | 22 | 3.41% | 75,028 | 72,553 |
| Delaware County | 23 | 3.41% | 41,767 | 40,390 |
| Nowata County | 24 | 3.39% | 9,641 | 9,325 |
| Washington County | 25 | 3.31% | 54,348 | 52,606 |
| Cleveland County | 26 | 3.29% | 305,991 | 296,256 |
| Mayes County | 27 | 3.24% | 40,317 | 39,053 |
| Oklahoma County | 28 | 2.96% | 821,884 | 798,283 |
| Stephens County | 29 | 2.94% | 44,084 | 42,823 |
| Carter County | 30 | 2.86% | 49,416 | 48,041 |
| Garvin County | 31 | 2.83% | 26,380 | 25,655 |
| Adair County | 32 | 2.79% | 20,001 | 19,458 |
| Craig County | 33 | 2.78% | 14,536 | 14,143 |
| Osage County | 34 | 2.6% | 46,982 | 45,792 |
| Haskell County | 35 | 2.42% | 11,832 | 11,552 |
| Okmulgee County | 36 | 1.47% | 37,228 | 36,688 |
| Okfuskee County | 37 | 1.41% | 11,431 | 11,272 |
| Johnston County | 38 | 1.4% | 10,387 | 10,244 |
| Jefferson County | 39 | 0.94% | 5,381 | 5,331 |
| Muskogee County | 40 | 0.91% | 66,848 | 66,245 |
| Alfalfa County | 41 | 0.89% | 5,763 | 5,712 |
| Ottawa County | 42 | 0.87% | 30,492 | 30,229 |
| Washita County | 43 | 0.54% | 10,962 | 10,903 |
| Beckham County | 44 | 0.15% | 22,364 | 22,331 |
| Pontotoc County | 45 | 0.05% | 38,114 | 38,094 |
| Noble County | 46 | 0.05% | 10,927 | 10,922 |
| Woods County | 47 | 0.01% | 8,604 | 8,603 |
| Cotton County | 48 | -0.02% | 5,536 | 5,537 |
| Hughes County | 49 | -0.07% | 13,336 | 13,346 |
| Comanche County | 50 | -0.18% | 120,924 | 121,144 |
| Latimer County | 51 | -0.28% | 9,457 | 9,484 |
| Pushmataha County | 52 | -0.45% | 10,744 | 10,793 |
| Grant County | 53 | -0.45% | 4,158 | 4,177 |
| Beaver County | 54 | -0.6% | 4,998 | 5,028 |
| McCurtain County | 55 | -0.62% | 30,653 | 30,844 |
| Murray County | 56 | -0.76% | 13,773 | 13,878 |
| Kay County | 57 | -0.82% | 43,253 | 43,611 |
| Custer County | 58 | -0.86% | 28,200 | 28,444 |
| Pittsburg County | 59 | -1.07% | 43,318 | 43,787 |
| Harper County | 60 | -1.14% | 3,211 | 3,248 |
| Garfield County | 61 | -1.18% | 61,959 | 62,701 |
| Blaine County | 62 | -1.18% | 8,599 | 8,702 |
| Choctaw County | 63 | -1.29% | 14,024 | 14,207 |
| Jackson County | 64 | -1.41% | 24,397 | 24,747 |
| Seminole County | 65 | -1.68% | 23,117 | 23,512 |
| Caddo County | 66 | -1.8% | 26,421 | 26,905 |
| Greer County | 67 | -2.15% | 5,375 | 5,493 |
| Woodward County | 68 | -2.49% | 19,909 | 20,418 |
| Major County | 69 | -3.02% | 7,515 | 7,749 |
| Texas County | 70 | -3.05% | 20,642 | 21,291 |
| Kiowa County | 71 | -3.58% | 8,192 | 8,496 |
| Dewey County | 72 | -4.25% | 4,283 | 4,473 |
| Roger Mills County | 73 | -4.4% | 3,277 | 3,428 |
| Ellis County | 74 | -4.83% | 3,565 | 3,746 |
| Tillman County | 75 | -4.87% | 6,605 | 6,943 |
| Cimarron County | 76 | -9.26% | 2,078 | 2,290 |
| Harmon County | 77 | -10.26% | 2,221 | 2,475 |
Oklahoma's counties show varied growth patterns from 2020 to 2025. Canadian County leads with 20.52% annualized growth, followed by McClain County (18.85%) and Wagoner County (14.42%). The largest counties are Oklahoma County (821,884), Tulsa County (700,617), and Cleveland County (305,991). Of the 77 counties in Oklahoma, 47 are growing while 30 have experienced population decline. Overall, counties averaged 1.77% annualized growth, with total population growing by 4.07% annually.
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