Lemmon is a city located in South Dakota. With a 2020 population of 1,140, it is the 56th largest city in South Dakota and the 9794th largest city in the United States. Lemmon is currently declining at a rate of -1.47% annually and its population has decreased by -7.09% since the most recent census, which recorded a population of 1,227 in 2010. Lemmon reached it's highest population of 1,249 in 2012. Spanning over 1 miles, Lemmon has a population density of 1,101 people per square mile.
The average household income in Lemmon is $57,995 with a poverty rate of 15.30%. The median rental costs in recent years comes to $586 per month, and the median house value is $66,700. The median age in Lemmon is 52.6 years, 51.9 years for males, and 52.8 years for females. For every 100 females there are 94.8 males.