Adair County	001	Stilwell	1907	Cherokee lands[9]	William Penn Adair, Cherokee tribal leader and Confederate colonel in the American Civil War[9]	39.38	22,683	576 sq mi
(1,492 km2)	State map highlighting Adair County
Alfalfa County	003	Cherokee	1907	Woods County	William H. "Alfalfa Bill" Murray, ninth Governor of Oklahoma[10]	6.51	5,642	867 sq mi
(2,246 km2)	State map highlighting Alfalfa County
Atoka County	005	Atoka	1907	Choctaw lands	Captain Atoka, a noted Choctaw leader and signer of the Treaty of Dancing Rabbit Creek[11]	14.5	14,182	978 sq mi
(2,533 km2)	State map highlighting Atoka County
Beaver County	007	Beaver	1890	Seventh County (entire panhandle until 1907)[12]	The Beaver River[13]	3.11	5,636	1,814 sq mi
(4,698 km2)	State map highlighting Beaver County
Beckham County	009	Sayre	1907	Greer County and Roger Mills County[14]	J. C. W. Beckham, Governor of Kentucky[14]	24.52	22,119	902 sq mi
(2,336 km2)	State map highlighting Beckham County
Blaine County	011	Watonga	1890	Part of Cheyenne and Arapaho reservation.[15]	James G. Blaine, Speaker of the U. S. House of Representatives, U.S. Senator and Secretary of State[16]	12.86	11,943	929 sq mi
(2,406 km2)	State map highlighting Blaine County
Bryan County	013	Durant	1907	Choctaw lands	William Jennings Bryan, Secretary of State, famous orator and three-time U.S. Presidential candidate[17]	46.66	42,416	909 sq mi
(2,354 km2)	State map highlighting Bryan County
Caddo County	015	Anadarko	1901	Indian Territory	From Indian word "Kaddi" meaning life or chief[18]	23.16	29,600	1,278 sq mi
(3,310 km2)	State map highlighting Caddo County
Canadian County	017	El Reno	1901	Part of Cheyenne and Arapaho reservation[19]	The Canadian River.[20]	128.38	115,541	900 sq mi
(2,331 km2)	State map highlighting Canadian County
Carter County	019	Ardmore	1907	Pickens County, Chickasaw Nation	A prominent family of early settlers[21]	57.71	47,557	824 sq mi
(2,134 km2)	State map highlighting Carter County
Cherokee County	021	Tahlequah	1907	Originally settled by Cherokee Indians following the Trail of Tears	Cherokee Nation of Indians[22]	62.57	46,987	751 sq mi
(1,945 km2)	State map highlighting Cherokee County
Choctaw County	023	Hugo	1907	Choctaw Nation	Choctaw Nation of Indians[23]	19.64	15,205	774 sq mi
(2,005 km2)	State map highlighting Choctaw County
Cimarron County	025	Boise City	1907	Seventh County (entire panhandle until 1907)[12]	Cimarron River[24]	1.34	2,475	1,835 sq mi
(4,753 km2)	State map highlighting Cimarron County
Cleveland County	027	Norman	1890	County 3 in Oklahoma Territory.	Grover Cleveland, twice President of the United States[25]	477.15	255,755	536 sq mi
(1,388 km2)	State map highlighting Cleveland County
Coal County	029	Coalgate	1907	Tobucksy County, Choctaw Nation	Coal, the primary economic product of the region at the time[26]	11.44	5,925	518 sq mi
(1,342 km2)	State map highlighting Coal County
Comanche County	031	Lawton	1907	Kiowa, Comanche, and Apache reservation	Spanish "Camino Ancho", meaning broad trail[27]	116.09	124,098	1,069 sq mi
(2,769 km2)	State map highlighting Comanche County
Cotton County	033	Walters	1912	Lands of Quapaws, Choctaws, Chickasaws, Comanche Reservation, and Big Pasture	The principal economic base of the county, cotton[28]	9.72	6,193	637 sq mi
(1,650 km2)	State map highlighting Cotton County
Craig County	035	Vinita	1907	Cherokee Nation	Granville Craig, a prominent Cherokee planter[29]	19.75	15,029	761 sq mi
(1,971 km2)	State map highlighting Craig County
Creek County	037	Sapulpa	1907	Creek Nation	Creek Nation of Indians[30]	73.19	69,967	956 sq mi
(2,476 km2)	State map highlighting Creek County
Custer County	039	Arapaho	1891	Cheyenne-Arapaho Reservation	George A. Custer, United States Army cavalry commander during the Indian Wars[31]	27.83	27,469	987 sq mi
(2,556 km2)	State map highlighting Custer County
Delaware County	041	Jay	1907	Delaware District of Cherokee Nation	Delaware Nation of Indians [2]	55.99	41,487	741 sq mi
(1,919 km2)	State map highlighting Delaware County
Dewey County	043	Taloga	1892	Cheyenne-Arapaho Reservation	Admiral George Dewey, hero of the Spanish.American War[32]	4.81	4,810	1,000 sq mi
(2,590 km2)	State map highlighting Dewey County
Ellis County	045	Arnett	1907	Roger Mills and Woodward counties	Albert H. Ellis, member of the Oklahoma Constitutional Convention and first state Legislature[33]	3.38	4,151	1,229 sq mi
(3,183 km2)	State map highlighting Ellis County
Garfield County	047	Enid	1893	Cherokee Outlet	James Garfield, President of the United States[34]	57.26	60,580	1,058 sq mi
(2,740 km2)	State map highlighting Garfield County
Garvin County	049	Pauls Valley	1907	Chickasaw Nation	Samuel Garvin, a prominent Chickasaw Indian and local merchant[35]	34.09	27,576	809 sq mi
(2,095 km2)	State map highlighting Garvin County
Grady County	051	Chickasha	1907	Pickens County, Chickasaw Nation	Henry W. Grady, editor of the Atlanta Constitution[36]	47.62	52,431	1,101 sq mi
(2,852 km2)	State map highlighting Grady County
Grant County	053	Medford	1892	County L	Ulysses S. Grant, President of the United States[37]	4.52	4,527	1,001 sq mi
(2,593 km2)	State map highlighting Grant County
Greer County	055	Mangum	1896	Greer County, Texas	John Alexander Greer, Lieutenant Governor of Texas[38]	9.76	6,239	639 sq mi
(1,655 km2)	State map highlighting Greer County
Harmon County	057	Hollis	1909	GREER County	Judson Harmon, U.S. Attorney General and Governor of Ohio[39]	5.43	2,922	538 sq mi
(1,393 km2)	State map highlighting Harmon County
Harper County	059	Buffalo	1893	Woodward County	Oscar G. Harper, clerk of the Oklahoma Constitutional Convention[40]	3.55	3,685	1,039 sq mi
(2,691 km2)	State map highlighting Harper County
Haskell County	061	Stigler	1907	San Bois County of the Choctaw Nation	Charles N. Haskell, first Governor of Oklahoma[41]	22.13	12,769	577 sq mi
(1,494 km2)	State map highlighting Haskell County
Hughes County	063	Holdenville	1907	Choctaw Nation and Creek Nation lands	William C. Hughes, member of the Oklahoma Constitutional Convention[2][42]	17.35	14,003	807 sq mi
(2,090 km2)	State map highlighting Hughes County
Jackson County	065	Altus	1907	Greer County	Either Stonewall Jackson, Confederate general during the American Civil War[43] or Andrew Jackson, seventh President of the United States[2]	32.93	26,446	803 sq mi
(2,080 km2)	State map highlighting Jackson County
Jefferson County	067	Waurika	1907	Comanche County and part of Chickasaw Nation	Thomas Jefferson, third President of the United States[44]	8.53	6,472	759 sq mi
(1,966 km2)	State map highlighting Jefferson County
Johnston County	069	Tishomingo	1907	Chickasaw Nation land	Douglas H. Johnston, Governor of the Chickasaw Nation[45]	16.99	10,957	645 sq mi
(1,671 km2)	State map highlighting Johnston County
Kay County	071	Newkirk	1895	County K, Cherokee Strip	Originally designated as county "K"[46]	50.67	46,562	919 sq mi
(2,380 km2)	State map highlighting Kay County
Kingfisher County	073	Kingfisher	1907	Unassigned Lands	Either for the kingfisher bird[2] or King David Fisher, an early settler in the area[47]	16.65	15,034	903 sq mi
(2,339 km2)	State map highlighting Kingfisher County
Kiowa County	075	Hobart	1901	Kiowa-Comanche-Apache Indian Reservations	Kiowa Nation of Indians [48]	9.31	9,446	1,015 sq mi
(2,629 km2)	State map highlighting Kiowa County
Latimer County	077	Wilburton	1907	Choctaw Nation land	James S. Latimer, member of the Oklahoma Constitutional Convention[49]	15.45	11,154	722 sq mi
(1,870 km2)	State map highlighting Latimer County
Le Flore County	079	Poteau	1907	Choctaw Nation[50]	A Choctaw Indian family of French descent[2]	31.77	50,384	1,586 sq mi
(4,108 km2)	State map highlighting Le Flore County
Lincoln County	081	Chandler	1891	County A in Oklahoma Territory	Abraham Lincoln, the sixteenth president of the United States	35.74	34,273	959 sq mi
(2,484 km2)	State map highlighting Lincoln County
Logan County	083	Guthrie	1891	County 1 in Oklahoma Territory	John A. Logan, American Civil War general	56.17	41,848	745 sq mi
(1,930 km2)	State map highlighting Logan County
Love County	085	Marietta	1907	Pickens County, Chickasaw Nation, Indian Territory	Overton Love, Chickasaw judge and prominent landowner	18.3	9,423	515 sq mi
(1,334 km2)	State map highlighting Love County
Major County	093	Fairview	1909	Woods County, Oklahoma Territory	John C. Major, member of the Oklahoma Constitutional Convention	7.87	7,527	957 sq mi
(2,479 km2)	State map highlighting Major County
Marshall County	095	Madill	1907	Pickens County, Chickasaw Nation, Indian Territory[51]	The maiden name of a member of the Constitutional Convention's mother	42.7	15,840	371 sq mi
(961 km2)	State map highlighting Marshall County
Mayes County	097	Pryor	1907	Saline District, Cherokee Nation[52]	Cherokee leader Samuel Houston Mayes	62.89	41,259	656 sq mi
(1,699 km2)	State map highlighting Mayes County
McClain County	087	Purcell	1907	Choctaw Nation land	Charles M. McClain, member of the Oklahoma Constitutional Convention	60.54	34,506	570 sq mi
(1,476 km2)	State map highlighting McClain County
McCurtain County	089	Idabel	1907	[53]	The McCurtain family, a prominent Choctaw landowning group	17.9	33,151	1,852 sq mi
(4,797 km2)	State map highlighting McCurtain County
McIntosh County	091	Eufaula	1907	Creek Nation land[54]	The McIntosh family, a prominent Creek landowning group	32.66	20,252	620 sq mi
(1,606 km2)	State map highlighting McIntosh County
Murray County	099	Sulphur	1907	Chickasaw Nation land	Governor of Oklahoma William H. "Alfalfa Bill" Murray	32.27	13,488	418 sq mi
(1,083 km2)	State map highlighting Murray County
Muskogee County	101	Muskogee	1907	Muskogee District of Creek Nation and part of Illinois and Canadian Districts of Cherokee Nation[55]	Muskogee Nation of Indians	87.21	70,990	814 sq mi
(2,108 km2)	State map highlighting Muskogee County
Noble County	103	Perry	1897	County P in Oklahoma Territory.[56]	U.S. Secretary of the Interior John W. Noble	15.79	11,561	732 sq mi
(1,896 km2)	State map highlighting Noble County
Nowata County	105	Nowata	1907	Cooweescoowee District of Cherokee Nation[57]	The town of Nowata, Oklahoma. The exact origin is unknown, but the two most common stories are that railroad surveyors used the Delaware word noweta for welcome or that a sign was posted indicating that local springs had no water: No wata	18.65	10,536	565 sq mi
(1,463 km2)	State map highlighting Nowata County
Okfuskee County	107	Okemah	1907	Creek Nation land	Creek town of the same name in Cleburn County, Alabama	19.51	12,191	625 sq mi
(1,619 km2)	State map highlighting Okfuskee County
Oklahoma County	109	Oklahoma City	1891	Unassigned Lands in Indian Territory, the County 2 in Oklahoma Territory[58]	From two Choctaw words okla and humma, meaning people and red	1,013.59	718,633	709 sq mi
(1,836 km2)	State map highlighting Oklahoma County
Okmulgee County	111	Okmulgee	1907	Creek Nation land	Creek word meaning boiling water	57.49	40,069	697 sq mi
(1,805 km2)	State map highlighting Okmulgee County
Osage County	113	Pawhuska	1907	Coterminous with Osage Reservation	The Osage Indian Reservation, inhabited by the Osage Nation	21.09	47,472	2,251 sq mi
(5,830 km2)	State map highlighting Osage County
Ottawa County	115	Miami	1907	Multiple tribal reservations in Indian Territory.[59]	Ottawa Native American people	67.62	31,848	471 sq mi
(1,220 km2)	State map highlighting Ottawa County
Pawnee County	117	Pawnee	1897	Cherokee Outlet, then County Q in Oklahoma Territory[60]	The Skidi Pawnee Native American people	29.08	16,577	570 sq mi
(1,476 km2)	State map highlighting Pawnee County
Payne County	119	Stillwater	1890	County 6 in Oklahoma Territory in 1889, renamed to Payne County in 1907[61]	David L. Payne, the key figure in opening Oklahoma to white settlement	112.76	77,350	686 sq mi
(1,777 km2)	State map highlighting Payne County
Pittsburg County	121	McAlester	1907	Choctaw Nation land[62]	Pittsburgh, Pennsylvania	35.1	45,837	1,306 sq mi
(3,383 km2)	State map highlighting Pittsburg County
Pontotoc County	123	Ada	1907	Chickasaw Nation[63]	Pontotoc is a Chickasaw word meaning cat tails growing on the prairie	52.07	37,492	720 sq mi
(1,865 km2)	State map highlighting Pontotoc County
Pottawatomie County	125	Shawnee	1891	Creek Nation and Seminole Nation lands.[64]	The Pottawatomie Native American people	88.12	69,442	788 sq mi
(2,041 km2)	State map highlighting Pottawatomie County
Pushmataha County	127	Antlers	1907	Pushmataha District of the Choctaw Nation[65]	The Pushmataha District of the Choctaw Nation	8.28	11,572	1,397 sq mi
(3,618 km2)	State map highlighting Pushmataha County
Roger Mills County	129	Cheyenne	1895	County F in Oklahoma Territory[66]	U.S. Senator Roger Q. Mills	3.19	3,647	1,142 sq mi
(2,958 km2)	State map highlighting Roger Mills County
Rogers County	131	Claremore	1907	Cooweescoowee District, Cherokee Nation, Indian Territory[67]	Clem V. Rogers, a member of the Oklahoma Constitutional Convention and the father of entertainer Will Rogers	128.75	86,905	675 sq mi
(1,748 km2)	State map highlighting Rogers County
Seminole County	133	Wewoka	1907	Seminole Nation[68]	The Seminole Native American people	40.32	25,482	632 sq mi
(1,637 km2)	State map highlighting Seminole County
Sequoyah County	135	Sallisaw	1907	Sequoyah District and part of Illinois District, Cherokee Nation	Sequoyah (George Guess), invented the Cherokee syllabary[69]	62.89	42,391	674 sq mi
(1,746 km2)	State map highlighting Sequoyah County
Stephens County	137	Duncan	1907	Comanche County, Oklahoma Territory	John Hall Stephens, a Texas congressman and advocate of Oklahoma statehood	51.37	45,048	877 sq mi
(2,271 km2)	State map highlighting Stephens County
Texas County	139	Guymon	1907	Seventh County (entire panhandle until 1907)[12]	The neighboring U.S. state of Texas	10.13	20,640	2,037 sq mi
(5,276 km2)	State map highlighting Texas County
Tillman County	141	Frederick	1907	Comanche County, Oklahoma[70]	U.S. Senator Benjamin Tillman of South Carolina	9.17	7,992	872 sq mi
(2,258 km2)	State map highlighting Tillman County
Tulsa County	143	Tulsa	1907	Cherokee Nation and Creek Nation land.	Derived from Tulsey Town, Alabama, an old Creek settlement.	1,058.6	603,403	570 sq mi
(1,476 km2)	State map highlighting Tulsa County
Wagoner County	145	Wagoner	1907	Cherokee Nation land[71]	Bailey P. Waggoner, attorney of the Missouri Pacific Railroad, which established the town of Wagoner[7]	129.81	73,085	563 sq mi
(1,458 km2)	State map highlighting Wagoner County
Washington County	147	Bartlesville	1907	Cooweescoowee District of Cherokee Nation.[72]	First President of the United States George Washington	122.24	50,976	417 sq mi
(1,080 km2)	State map highlighting Washington County
Washita County	149	Cordell	1897	County H in Oklahoma Territory[73]	The Washita River	11.58	11,629	1,004 sq mi
(2,600 km2)	State map highlighting Washita County
Woods County	151	Alva	1893	County M in Oklahoma Territory.[74]	Kansas populist and territorial legislator Samuel Newitt Wood	6.9	8,878	1,287 sq mi
(3,333 km2)	State map highlighting Woods County
Woodward County	153	Woodward	1893	County N in Oklahoma Territory[75]	Santa Fe Railroad director B. W. Woodward	16.17	20,081	1,242 sq mi
(3,217 km2)	State map highlighting Woodward County