Lennox is a city in Lincoln County, South Dakota, United States. Located 20 milles south west from largest South Dakota city, Sioux Falls. The population was 2,111 at the 2010 census.HistoryThe city has the name of Ben Lennox, a railroad official.GeographyLennox is located at .According to the United States Census Bureau, the city has a total area of 1.31sqmi, all of it land.Lennox has been assigned the ZIP code 57039 and the FIPS place code 36380.There are 4 July festivities each year, including the firecracker road race in the morning and a parade afterward.Demographics2010 censusAs of the census of 2010, there were 2,111 people, 842 households, and 542 families residing in the city. The population density was 1611.5PD/sqmi. There were 914 housing units at an average density of 697.7/sqmi. The racial makeup of the city was 98.2% White, 0.1% African American, 0.6% Native American, 0.4% Asian, and 0.6% from two or more races. Hispanic or Latino of any race were 1.1% of the population.