Poteau ( /poʊtoʊ/ poh-toh) is a city in Le Flore County, Oklahoma, United States. It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area. The population was 8,520 at the 2010 census, ranking fifth in the Greater Fort Smith Area. It is the county seat of Le Flore County. It is the home of the "World's Highest Hill", Cavanal Hill.
According to the United States Census Bureau, the city has a total area of 31.7 square miles (82 km2), of which 28.6 square miles (74 km2) is land and 3.0 square miles (7.8 km2), or 9.54%, is water.
As of the census of 2000, there were 7,939 people, 3,013 households, and 2,042 families residing in the city. The population density was 277.2 people per square mile (107.0/km²). There were 3,351 housing units at an average density of 117.0 per square mile (45.2/km²). The racial makeup of the city was 82.14% White, 2.24% African American, 10.00% Native American, 0.38% Asian, 0.03% Pacific Islander, 1.39% from other races, and 3.83% from two or more races. Hispanic or Latino of any race were 5.82% of the population.