Name of County
|
Date Formed
|
Boundary Changes
|
Parent County
|
Counties Created by Boundary Changes
|
Adair
|
1907 Jul 16
|
Details
|
Cherokee Lands
|
none
|
Alfalfa
|
1907 Jul 16
|
Details
|
Woods
|
none
|
Atoka
|
1907 Jul 16
|
Details
|
Choctaw Lands
|
none
|
Beaver
|
1890 0 18
|
Details
|
Oklahoma Territory
|
Cimarron 1907, Texas 1907
|
Beckham
|
1907 Jul 16
|
Details
|
Roger Mills
|
none
|
Blaine
|
1892 Apr 19
|
Details
|
Cheyenne, Arapaho land
|
none
|
Bryan
|
1907 Jul 16
|
Details
|
Choctaw Lands
|
none
|
Caddo
|
1901 Aug 05
|
Details
|
Kowa, Comanche,Apache, Wichita, Caddo lands
|
Grady 1907
|
Canadian
|
1890 18 Ma
|
Details
|
Oklahoma Territory
|
none
|
Carter
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Cherokee
|
1907 Jul 16
|
Details
|
Tahlequah District
|
Delaware 1907
|
Choctaw
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Cimarron
|
1907 Jul 16
|
Details
|
Beaver
|
none
|
Cleveland
|
1890 18 Ma
|
Details
|
Oklahoma Territory
|
none
|
Coal
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Comanche
|
1901 Aug 05
|
Details
|
Kiowa, Comanche lands
|
Cotton 1912, Grady 1907, Jefferson 1907, Kiowa 1907, Stephens 1907
|
Cotton
|
1912 Aug 27
|
Details
|
Comanche
|
none
|
Craig
|
907 Jul 16
|
Details
|
Cherokee lands
|
none
|
Creek
|
1907 Jul 16
|
Details
|
Creek lands
|
Muskogee 1907
|
Custer
|
1892 Aug 19
|
Details
|
Cheyenne & Arapaho land opening
|
none
|
Day
|
1892 Apr 19
|
Details
|
Cheyenne & Arapaho land opening
|
absorbed by Ellis 1907
|
Delaware
|
1907 Jul 16
|
Details
|
Cherokee
|
none
|
Dewey
|
1892 Apr 19
|
Details
|
Cheyenne & Arapaho land opening
|
none
|
Ellis
|
1907 Jul 16
|
Details
|
Day, Woodward
|
none
|
Garfield
|
1893 sep 16
|
Details
|
Cherokee Outlet land
|
none
|
Garvin
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Grady
|
1907 Jul 16
|
Details
|
Caddo, Comanche lands
|
none
|
Grant
|
1893 Sep 16
|
Details
|
Cherokee Outletland
|
none
|
Greer
|
1886 6 18
|
Details
|
Cherokee lands
|
Harmon 1909, Jackson 1907
|
Harmon
|
1909 Jun 02
|
Details
|
Greer, Jackson
|
none
|
Harper
|
1907 Jul 16
|
Details
|
Indian lands, Woods, Woodward
|
none
|
Haskell
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Hughes
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Jackson
|
1907 Jul 16
|
Details
|
Greer
|
Harmon 1909
|
Jefferson
|
1907 Jul 16
|
Details
|
Comanche, Chickasaw lands
|
none
|
Johnston
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Kay
|
1893 Sep 16
|
Details
|
Cherokee Outlet land
|
none
|
Kingfisher
|
1890 18 Ma
|
Details
|
Oklahoma Territory
|
none
|
Kiowa
|
1901 Aug 05
|
Details
|
Kiowa, Comanche, Apache, Wichita, Caddo lands
|
Comanche 1907
|
Latimer
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
LeFlore
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Lincoln
|
1893 Sep 22
|
Details
|
Oklahoma Territory
|
none
|
Logan
|
1890 18 Ma
|
Details
|
Oklahoma Territory
|
none
|
Love
|
1907 Jul 16
|
Details
|
Chickasaw Territory
|
none
|
Major
|
1907 Jul 16
|
Details
|
Woods
|
none
|
Marshall
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Mayes
|
1907 Jul 16
|
Details
|
Cherokee lands
|
none
|
McClain
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
McCurtain
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
McIntosh
|
1907 Jul 16
|
Details
|
Creek lans
|
none
|
Murray
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Muskogee
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Noble
|
1907 Jul 16
|
Details
|
Cherokee Outlet land
|
none
|
Nowata
|
1907 Jul 16
|
Details
|
Cherokee lands
|
none
|
Okfuskee
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Oklahoma
|
1907 Jul 16
|
Details
|
Oklahoma Territory
|
none
|
Okmulgee
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Osage
|
1907 Jul 16
|
Details
|
Osage lands
|
none
|
Ottawa
|
1907 Jul 16
|
Details
|
Cherokee Nation
|
none
|
Pawnee
|
1893 Sep 16
|
Details
|
Cherokee Outlet land
|
none
|
Pittsburg
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Pontotoc
|
1907 Jul 16
|
Details
|
Chickasaw lands
|
none
|
Pottawatomie
|
1891 Sep 22
|
Details
|
Oklahoma Territory
|
none
|
Pushmataha
|
1907 Jul 16
|
Details
|
Choctaw lands
|
none
|
Roger Mills
|
1892 Apr 19
|
Details
|
Cheyene, Araphoe land
|
Beckham 1907
|
Rogers
|
1907 Jul 16
|
Details
|
Cherokee Nation
|
none
|
Seminole
|
1907 Jul 16
|
Details
|
Seminole lands
|
none
|
Sequoyah
|
1907 Jul 16
|
Details
|
Cherokee lands
|
none
|
Stephens
|
1907 Jul 16
|
Details
|
Comanche
|
none
|
Texas
|
1907 Jul 16
|
Details
|
Beaver
|
none
|
Tillman
|
1907 Jul 16
|
Details
|
Comanche
|
none
|
Tulsa
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Wagoner
|
1907 Jul 16
|
Details
|
Creek lands
|
none
|
Washington
|
1907 Jul 16
|
Details
|
Cherokee lands
|
none
|
Washita
|
1892 Apr 19
|
Details
|
Cheyenne, Arapaho
|
none
|
Woods
|
1893 Sep 16
|
Details
|
Cherokee Outlet land
|
Alfalfa 1907, Harper 1907, Major 1907
|
Woodward
|
1893 Sep 16
|
Details
|
Cherokee Outlet land
|
Ellis 1907, Harper 1907
|