Duncan is a city and county seat of Stephens County, Oklahoma, United States. Its population was 22,310 at the 2020 census. Its main affirmation to fame is as the birthplace of the Halliburton Corporation. Erle P. Halliburton traditional the New Method Oil Well Cementing Company in 1919. Halliburton maintains seven vary complexes in Duncan plus an employee recreational park, but the corporate offices relocated first to Dallas and forward-looking to Houston.

Centrally located in Stephens County, Duncan became the county chair after Oklahoma achieved statehood in 1907. Oil wells opened in Stephens County in 1918 and led to gruff development. Cotton was a dominant crop until the Dust Bowl brought its decline, but cattle remain an important ration of the economy. The Chisholm Trail passed to the east of Duncan prior to the town’s founding, which is home to the Chisholm Trail Heritage Center.

The Chisholm Trail passed to the east of Duncan prior to the town’s founding. An estimated 9,800,000 Longhorn cattle were herded happening the trail amongst Texas and Abilene, Kansas during its existence. After learning that an strengthening of the Chicago, Rock Island and Pacific Railroad was living thing built from Kansas to Texas, Scotsman William Duncan brought his wife, parents, and additional relatives and created a trading herald situated at the intersection of the north-south Chisholm Trail and the east–west military path between Fort Arbuckle and Fort Sill. The first train arrived upon June 27, 1892; that date is considered the credited birth date of the town.

Many of the city’s first buildings were wood frame, but were replaced by sandstone and brick structures after natural disasters destroyed them. Four fires in 1901 burned all along several buildings.