| Official Name: | McMillan, Oklahoma |
| Pushpin Map: | Oklahoma |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oklahoma |
| Subdivision Type2: | County |
| Subdivision Name2: | Marshall |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 758 |
| Coordinates: | 34.0897°N -96.9372°W |
| Area Code: | 580 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1100621 |
McMillan is an unincorporated community in Marshall County, Oklahoma, United States. McMillan is located south of U.S. Route 70 in the western part of the county, west of Madill.
A post office was established at McMillan, Indian Territory on March 28, 1892. It was named for Joseph E.A. McMillan, first postmaster.[1]
At the time of its founding, McMillan was located in Pickens County, Chickasaw Nation.[2]