McMillan is an unincorporated community in Marshall County, Oklahoma, United States.

[1] McMillan is located south of U.S. Route 70 in the western part of the county, 9.5 miles (15.3 km) west of Madill.

A post office was established at McMillan, Indian Territory on March 28, 1892.

[2] At the time of its founding, McMillan was located in Pickens County, Chickasaw Nation.

This Oklahoma state location article is a stub.