Leeton is a city in Johnson County, Missouri, United States. The population was 566 at the 2010 census.
Leeton was platted in 1895, and named after J. J. Lee, the original owner of the town site. A post office called Leeton has been in operation since 1882.
Leeton is located at 38°35′1″N 93°41′43″W (38.583655, -93.695270).
According to the United States Census Bureau, the city has a total area of 0.51 square miles (1.32 km2), all land.
As of the census of 2010, there were 566 people, 232 households, and 151 families living in the city. The population density was 1,109.8 inhabitants per square mile (428.5/km2). There were 283 housing units at an average density of 554.9 per square mile (214.2/km2). The racial makeup of the city was 96.5% White, 0.4% African American, 1.2% Native American, 0.4% Asian, and 1.6% from two or more races. Hispanic or Latino of any race were 1.1% of the population.
There were 232 households, of which 37.1% had children under the age of 18 living with them, 46.6% were married couples living together, 11.2% had a female householder with no husband present, 7.3% had a male householder with no wife present, and 34.9% were non-families. 30.2% of all households were made up of individuals, and 9.9% had someone living alone who was 65 years of age or older.