Duncan, OK Insights: Population,
Zip Codes, Influence, and Service Areas

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

Zip Codes in Duncan, OK that we also serve: 73533 73055 73534





Cities Close To Duncan, OK That We Also Serve



Locksmith

Locksmith9000 delivers fast, reliable, and professional locksmith services nationwide.

Our Locksmith center

With expert technicians available 24/7 and service coverage in all 50 states, we’re the go-to solution for residential, commercial, and automotive lock problems. Whether you’re in New York, Los Angeles, or a small town in between, our mobile locksmiths are just a call away — ready to restore your peace of mind.