Leonard is a city in Cass County, North Dakota, United States. The population was 223 at the 2010 census. Leonard was founded in 1881.
Leonard had its start in 1881 when the railroad was extended to that point. A post office has been in operation at Leonard since 1881.
Leonard is located at 46°39′4″N 97°14′44″W (46.651034, -97.245694).
According to the United States Census Bureau, the city has a total area of 0.75 square miles (1.94 km2), all of it land.
As of the census of 2010, there were 223 people, 109 households, and 69 families living in the city. The population density was 297.3 inhabitants per square mile (114.8/km2). There were 121 housing units at an average density of 161.3 per square mile (62.3/km2). The racial makeup of the city was 97.8% White, 1.3% Native American, and 0.9% from two or more races. Hispanic or Latino of any race were 2.2% of the population.
There were 109 households of which 22.0% had children under the age of 18 living with them, 54.1% were married couples living together, 5.5% had a female householder with no husband present, 3.7% had a male householder with no wife present, and 36.7% were non-families.