Ranking of Oklahoma Counties By Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Oklahoma (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 803,726. Among all Oklahoma counties, Oklahoma County had the highest population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (127,327), followed by Tulsa County (110,919), and Cleveland County (47,144).
The chart below shows the top 10 Oklahoma counties, and the table below shows the ranking of all Oklahoma counties.
You can see similar information for other educational attainments.
You can also see similar information for other states and for the United States.
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Related Topics: Oklahoma ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Oklahoma Counties By Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Oklahoma County | 127327 |
| 2 | Tulsa County | 110919 |
| 3 | Cleveland County | 47144 |
| 4 | Canadian County | 27052 |
| 5 | Comanche County | 24859 |
| 6 | Rogers County | 21200 |
| 7 | Creek County | 19711 |
| 8 | Wagoner County | 17017 |
| 9 | Pottawatomie County | 16689 |
| 10 | Muskogee County | 15431 |
| 11 | Garfield County | 15134 |
| 12 | Grady County | 14687 |
| 13 | Le Flore County | 13027 |
| 14 | Stephens County | 12610 |
| 15 | Payne County | 12141 |
| 16 | Osage County | 11954 |
| 17 | Washington County | 11805 |
| 18 | Carter County | 11684 |
| 19 | Pittsburg County | 11470 |
| 20 | Delaware County | 11014 |
| 21 | Mayes County | 10885 |
| 22 | Sequoyah County | 10609 |
| 23 | Logan County | 10128 |
| 24 | Bryan County | 9903 |
| 25 | Kay County | 9835 |
| 26 | Cherokee County | 9696 |
| 27 | Lincoln County | 9674 |
| 28 | McCurtain County | 8860 |
| 29 | McClain County | 8677 |
| 30 | Okmulgee County | 8575 |
| 31 | Caddo County | 7940 |
| 32 | Pontotoc County | 7932 |
| 33 | Garvin County | 7671 |
| 34 | Ottawa County | 7003 |
| 35 | McIntosh County | 6111 |
| 36 | Adair County | 6027 |
| 37 | Beckham County | 5938 |
| 38 | Woodward County | 5640 |
| 39 | Seminole County | 5564 |
| 40 | Custer County | 4573 |
| 41 | Pawnee County | 4553 |
| 42 | Jackson County | 4377 |
| 43 | Atoka County | 4114 |
| 44 | Craig County | 4051 |
| 45 | Kingfisher County | 4018 |
| 46 | Murray County | 3955 |
| 47 | Marshall County | 3903 |
| 48 | Choctaw County | 3780 |
| 49 | Hughes County | 3670 |
| 50 | Pushmataha County | 3433 |
| 51 | Haskell County | 3212 |
| 52 | Okfuskee County | 3151 |
| 53 | Washita County | 3072 |
| 54 | Texas County | 3048 |
| 55 | Nowata County | 2705 |
| 56 | Noble County | 2658 |
| 57 | Love County | 2601 |
| 58 | Johnston County | 2528 |
| 59 | Latimer County | 2445 |
| 60 | Blaine County | 2226 |
| 61 | Major County | 2162 |
| 62 | Kiowa County | 1961 |
| 63 | Woods County | 1664 |
| 64 | Tillman County | 1606 |
| 65 | Cotton County | 1590 |
| 66 | Jefferson County | 1555 |
| 67 | Coal County | 1533 |
| 68 | Alfalfa County | 1501 |
| 69 | Greer County | 1485 |
| 70 | Dewey County | 1236 |
| 71 | Beaver County | 1098 |
| 72 | Ellis County | 1004 |
| 73 | Grant County | 998 |
| 74 | Roger Mills County | 829 |
| 75 | Harper County | 719 |
| 76 | Cimarron County | 586 |
| 77 | Harmon County | 583 |
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