Leon is a city in Butler County, Kansas, United States. As of the 2010 census, the city population was 704.
Leon is located at 37°41′22″N 96°46′59″W / 37.689516°N 96.783109°W / 37.689516; -96.783109 (37.689516, -96.783109). According to the United States Census Bureau, the city has a total area of 0.6 square miles (1.5 km2), all of it land.
As of the census of 2000, there were 645 people, 245 households, and 175 families residing in the city. The population density was 1,090.8 people per square mile (422.1/km2). There were 269 housing units at an average density of 454.9 per square mile (176.0/km2). The racial makeup of the city was 93.64% White, 0.62% African American, 1.71% Native American, 1.55% from other races, and 2.48% from two or more races. Hispanic or Latino of any race were 4.96% of the population.