Tecumseh (Meskwaki: Takamithîheki[4]) is a city in Pottawatomie County, Oklahoma.

[6] A 320-acre (130-hectare) site was opened for settlement September 23, 1891, as a result of the land run into reservations of the Sac and Fox, Kiowa, Kickapoo, Shawnee, and Pottawatomi peoples.

The townsite, named Tecumseh by a U.S. Army major, had been designated as the seat of County "B" in the newly formed Oklahoma Territory by the Department of the Interior on July 17, 1891.

[7] This trackage, acquired by the Choctaw, Oklahoma and Gulf Railroad, was extended to Asher in 1902, and was later owned by the Rock Island.

[7] In 1903, the Atchison, Topeka and Santa Fe Railway began serving Tecumseh's surrounding agricultural region, in which cotton was the main crop.

[8] Cotton production dropped in the 1920s because of depressed prices and a boll weevil infestation.

[6] In 2002, the Supreme Court of the United States evaluated whether requiring students from Tecumseh schools to take drug tests to participate in extracurricular activities was constitutional.

In a 5–4 decision, the court ruled that the tests were allowable in Board of Education v. Earls.

It previously served as an orphanage and mental-health center in addition to being a juvenile correctional facility.