Iron Post is a census-designated place (CDP) in Mayes County, Oklahoma, United States.

According to the United States Census Bureau, the CDP has a total area of 2.7 square miles (7.0 km2), all land.

As of the census[5] of 2000, there were 117 people, 44 households, and 33 families residing in the CDP.

The racial makeup of the CDP was 59.83% White, 30.77% Native American, and 9.40% from two or more races.

25.0% of all households were made up of individuals, and 9.1% had someone living alone who was 65 years of age or older.