Land run (sometimes "land rush") usually refers to a historical event in which previously restricted land of the United States was opened to homestead on a first-arrival basis. Lands were opened and sold first-come or by bid, or won by lottery, or by means other than a run. The settlers, no matter how they acquired occupancy, purchased the land from the United States Land Office. For former Indian lands, the Land Office distributed the sales funds to the various tribal entities, according to previously negotiated terms. The Oklahoma Land Run of 1889 was the most prominent of the land runs while the Land Run of 1893 was the largest. The opening of the former Kickapoo area in 1895 was the last use of a land run in the present area of Oklahoma.
After years of raids—led by the leaders of the Boomers activist movement such as David L. Payne—into the central area of what would become the U.S. state of Oklahoma, Congress finally agreed to open what was dubbed the Unassigned Lands. Seven land runs in all took place in Oklahoma, beginning with the initial and most famous Land Run of April 22, 1889, which gave rise to the terms "Eighty-Niner" (a veteran of that run) and "Sooner." That area led to today's Canadian, Cleveland, Kingfisher, Logan, Oklahoma, and Payne counties of Oklahoma.
The Land Run of September 22, 1891, opened the Iowa, Sac and Fox, Potawatomi, and Shawnee lands to settlement. The land run opened 6,097 plots of 160 acres (0.65 km2) each of former reservation land. On the following day, a land run was held to settle Tecumseh, the pre-designated location of the county seat of County B, later renamed as Pottawatomie County. On September 28, 1891, another land run was held to settle Chandler, the pre-designated location of the county seat of County A, later renamed as Lincoln County.