Lebanon is census-designated place (CDP) and unincorporated community in Marshall County, Oklahoma, United States.

A Chickasaw Tribal Courthouse was located in Lebanon.

As of the census of 2000, the population of the ZCTA for ZIP Code 73440 was 327.

There is one dollar general and gas station, and a few other small businesses.

Lebanon is served by State Highway 32 and other local roads.