1892History
The first train arrived on June 27, 1892; that date is considered the official birth date of the town.
1901Disaster
=== 20th century ===
Four fires in 1901 burned down several buildings.
1907History
Centrally located in Stephens County, Duncan became the county seat after Oklahoma achieved statehood in 1907.
1910History
The Duncan Weekly Eagle was published by Lee Woods from 1910 until 1935 and was later rebranded The Duncan Eagle from 1935 until it ceased publication in 1979.
1918Architecture
Oil wells opened in Stephens County in 1918 and led to rapid development.
1919Government
Halliburton established the New Method Oil Well Cementing Company in 1919.
1921History
On April 24, 1921, the Banner began publishing a Sunday issue.
1926Sports
== Notable people ==
Ben Aldridge (1926–1956) – professional football player
Jari Askins (born 1953) – Oklahoma State Representative; Lt.
1933History
The Duncan American was a weekly newspaper published from 1933 to 1935 by M.
1957Economy
He died in 1957, when the company had 201 offices in 22 states and 20 foreign countries.
1974Architecture
In 1974 the museum moved to the NRHP-listed old National Guard Armory in Fuqua Park, built in 1936-1937 as a WPA project.
2000History
=== 2000 census ===
At the 2000 census, 22,505 people in 9,406 households, including 6,424 families, were residing in the city.
2010History
=== 2010 census ===
At the 2010 census, 23,431 people and 9,535 households were residing in the city, with 11,064 housing units.