| Rank |
County |
Percentage with High School Diploma |
| 1 |
Canadian County, Oklahoma
|
91.2%
|
| 2 |
Cleveland County, Oklahoma
|
90.9%
|
| 3 |
Grant County, Oklahoma
|
90.1%
|
| 4 |
Rogers County, Oklahoma
|
89.6%
|
| 5 |
Woods County, Oklahoma
|
89.3%
|
| 6 |
Wagoner County, Oklahoma
|
89.0%
|
| 7 |
Payne County, Oklahoma
|
89.0%
|
| 8 |
Comanche County, Oklahoma
|
89.0%
|
| 9 |
Washington County, Oklahoma
|
88.6%
|
| 10 |
McClain County, Oklahoma
|
88.2%
|
| 11 |
Tulsa County, Oklahoma
|
88.2%
|
| 12 |
Noble County, Oklahoma
|
88.0%
|
| 13 |
Roger Mills County, Oklahoma
|
88.0%
|
| 14 |
Pawnee County, Oklahoma
|
87.3%
|
| 15 |
Logan County, Oklahoma
|
87.2%
|
| 16 |
Ellis County, Oklahoma
|
87.0%
|
| 17 |
Osage County, Oklahoma
|
87.0%
|
| 18 |
Garfield County, Oklahoma
|
86.5%
|
| 19 |
Dewey County, Oklahoma
|
85.9%
|
| 20 |
Oklahoma County, Oklahoma
|
85.8%
|
| 21 |
Kay County, Oklahoma
|
85.8%
|
| 22 |
Major County, Oklahoma
|
85.6%
|
| 23 |
Pontotoc County, Oklahoma
|
85.3%
|
| 24 |
Lincoln County, Oklahoma
|
85.3%
|
| 25 |
Grady County, Oklahoma
|
85.3%
|
| 26 |
Kingfisher County, Oklahoma
|
84.9%
|
| 27 |
Stephens County, Oklahoma
|
84.8%
|
| 28 |
Kiowa County, Oklahoma
|
84.8%
|
| 29 |
Pottawatomie County, Oklahoma
|
84.8%
|
| 30 |
Creek County, Oklahoma
|
84.4%
|
| 31 |
Mayes County, Oklahoma
|
84.4%
|
| 32 |
Woodward County, Oklahoma
|
84.3%
|
| 33 |
Cotton County, Oklahoma
|
84.3%
|
| 34 |
Washita County, Oklahoma
|
84.1%
|
| 35 |
Alfalfa County, Oklahoma
|
84.0%
|
| 36 |
Harper County, Oklahoma
|
83.9%
|
| 37 |
Carter County, Oklahoma
|
83.8%
|
| 38 |
Muskogee County, Oklahoma
|
83.8%
|
| 39 |
Cherokee County, Oklahoma
|
83.6%
|
| 40 |
Okmulgee County, Oklahoma
|
83.4%
|
| 41 |
Nowata County, Oklahoma
|
83.2%
|
| 42 |
Latimer County, Oklahoma
|
83.1%
|
| 43 |
Ottawa County, Oklahoma
|
83.1%
|
| 44 |
Custer County, Oklahoma
|
83.1%
|
| 45 |
Delaware County, Oklahoma
|
82.8%
|
| 46 |
Garvin County, Oklahoma
|
82.8%
|
| 47 |
Murray County, Oklahoma
|
82.7%
|
| 48 |
Jackson County, Oklahoma
|
82.4%
|
| 49 |
Bryan County, Oklahoma
|
82.3%
|
| 50 |
Beaver County, Oklahoma
|
82.1%
|
| 51 |
Caddo County, Oklahoma
|
81.9%
|
| 52 |
Pittsburg County, Oklahoma
|
81.9%
|
| 53 |
Love County, Oklahoma
|
81.7%
|
| 54 |
Johnston County, Oklahoma
|
81.4%
|
| 55 |
Blaine County, Oklahoma
|
81.2%
|
| 56 |
Sequoyah County, Oklahoma
|
81.1%
|
| 57 |
Seminole County, Oklahoma
|
80.9%
|
| 58 |
Beckham County, Oklahoma
|
80.9%
|
| 59 |
Atoka County, Oklahoma
|
80.5%
|
| 60 |
McCurtain County, Oklahoma
|
80.2%
|
| 61 |
Okfuskee County, Oklahoma
|
80.1%
|
| 62 |
Craig County, Oklahoma
|
79.8%
|
| 63 |
Marshall County, Oklahoma
|
79.7%
|
| 64 |
Pushmataha County, Oklahoma
|
79.7%
|
| 65 |
Le Flore County, Oklahoma
|
79.7%
|
| 66 |
McIntosh County, Oklahoma
|
79.5%
|
| 67 |
Coal County, Oklahoma
|
78.8%
|
| 68 |
Cimarron County, Oklahoma
|
78.5%
|
| 69 |
Greer County, Oklahoma
|
78.4%
|
| 70 |
Choctaw County, Oklahoma
|
78.4%
|
| 71 |
Haskell County, Oklahoma
|
77.4%
|
| 72 |
Jefferson County, Oklahoma
|
77.1%
|
| 73 |
Hughes County, Oklahoma
|
76.3%
|
| 74 |
Adair County, Oklahoma
|
76.3%
|
| 75 |
Tillman County, Oklahoma
|
76.2%
|
| 76 |
Harmon County, Oklahoma
|
76.1%
|
| 77 |
Texas County, Oklahoma
|
72.0%
|