Okreek is an unincorporated community in Todd County, South Dakota, United States.

[4] The town is wholly within the jurisdiction of the Rosebud Indian Reservation, and the populace is almost entirely Sioux-American.

Okreek consists primarily of two long blocks of inhabited tract housing, and has about 30 private telephone subscribers within town limits.

There is also an elementary school and a Post Office which has been assigned the ZIP Code of 57563.

[5] The name Okreek is a corruption of Oak Creek, a stream near the town site.