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History and Facts of Oklahoma Counties

Oklahoma Counties – The Indian Territory was created from the Indian Intercourse Act on June 30, 1834 and existed until May 2, 1890. The Oklahoma Territory existed from May 2, 1890, until November 16, 1907. The State of Oklahoma entered the union as the 46th state on November 16, 1907. Oklahoma borders ArkansasColoradoKansasMissouriNew Mexico and the Texas (west, south). It has 77 Counties.

Oklahoma originally had seven counties when it was first organized as the Oklahoma Territory. These counties were designated numerically, first through seventh. New counties added after this were designated by letters of the alphabet. The first seven counties were later renamed. The Oklahoma Constitutional Convention named all of the counties that were formed when Oklahoma entered statehood in 1907. Only two counties have been formed since then.

In 1776 the first Oklahoma county was Greer County and the last county to be formed was Cotton County in 1912.

List of Oklahoma Counties

Oklahoma is divided into 77 counties.

List of Old Former / Extinct Oklahoma Counties

Oklahoma has counties that no longer are in existence. A lot of these counties were established and disbanded within the 19th century; county borders have modified very little since 1900 in the vast most of states.

The below Oklahoma counties no longer exist:

?? County, Oklahoma

Created ? from ?. It was abolished ? and re-established as ? County on ?.

  • Day County Formed in 1892 from Cheyenne & Arapaho lands. Abolished in 1907; now Ellis County area. Day County in Oklahoma Territory, was abolished at statehood, comprising the northern portion of Roger Mills County and the southern portion of Ellis County. Named for William R. Day
  • A County “A County” was the original designation for Lincoln County, Oklahoma Territory. It included some of the former Absentee Shawnee, Iowa, Kickapoo, and Sac & Fox Lands administered by the Sac & Fox Agency.
  • B County “B County” was the original designation for Pottawatomie County, Oklahoma Territory. It included some of the former Absentee Shawnee, Kickapoo, and Pottawatomie Lands administered by the Sac & Fox Agency.
  • C County “C County” was the original designation for Blaine County, Oklahoma Territory
  • D County “D County” was the original designation for Dewey County, Oklahoma Territory
  • E County “E County” was the original designation for Day County, Oklahoma Territory
  • F County “F County” was the original designation for Roger Mills County, Oklahoma Territory.
  • G County “G County” was the original designation for Custer County, Oklahoma Territory.
  • H County “H County” was the original designation for Washita County, Oklahoma Territory.
  • I County “I County” was the original designation for Caddo County, Oklahoma Territory
  • K County “K County” was the original designation for Kay County, Oklahoma Territory
  • L County “L County” was the original designation for Grant County, Oklahoma Territory.
  • M County “M County” was the original designation for Woods County, Oklahoma Territory.
  • N County “N County” was the original designation for Woodward County, Oklahoma Territory.
  • O County “O County” was the original designation for Garfield County, Oklahoma Territory.
  • P County “P County” was the original designation for Noble County, Oklahoma Territory.
  • Q County “Q County” was the original designation for Pawnee County, Oklahoma Territory.
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Map of Oklahoma County Boundary Changes from 1819 to 1912

This Interactive Map of Oklahoma Counties show the historical boundaries, names, organization, and attachments of every county, extinct county and unsuccessful county proposal from the creation of Oklahoma from 1819-1912.

Fun Facts about Oklahoma Counties

County Name Facts

The County names:

  • 0 of them named for Native American words or people,
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Counties by Year

In 1776 the first Oklahoma county was Greer County and the last county to be formed was Cotton County in 1912.

  • ? County was the first county created on ?.
  •  The last county to be formed was ? County on ?.
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Facts for County Size

  • ? County (000 sq mi) is the largest county in Oklahoma.
  • ? County (000 sq mi) is the smallest county in Oklahoma.

Facts for County Population (2017 Est.)

  • ? County (000) is the most populated county in Oklahoma.
  • ? County (000) is the least populated county in Oklahoma.

Facts for Oklahoma Counties and Cities

Oklahoma’s 77 largest cities (2077) are:

  1. Birmingham (000) is in ? County and ? Counties
  2. Oklahoma City, Tulsa, Norman, Lawton, Broken Arrow, Edmond, Moore, Midwest City, Enid and Stillwater