Smithville is a town in McCurtain County, Oklahoma, United States.

[5] Smithville has the distinction of being the wettest spot in Oklahoma ranked by highest annual average precipitation, at 55.71 inches.

According to the United States Census Bureau, the town has a total area of 1.1 square miles (2.8 km2), all land.

As of the census of 2010, 113 people, 53 households, and 28 families were residing in the town.

[4] The racial makeup of the town was 58.4% White, 34.5% Native American, and 7.1% from two or more races.