Garretson is a city located in South Dakota. With a 2020 population of 1,145, it is the 57th largest city in South Dakota and the 9783rd largest city in the United States. Garretson is currently declining at a rate of -1.04% annually and its population has decreased by -1.80% since the most recent census, which recorded a population of 1,166 in 2010. Garretson reached it's highest population of 1,213 in 2013. Spanning over 2 miles, Garretson has a population density of 786 people per square mile.
The average household income in Garretson is $65,800 with a poverty rate of 2.84%. The median rental costs in recent years comes to $692 per month, and the median house value is $149,100. The median age in Garretson is 36.8 years, 38.9 years for males, and 35.3 years for females. For every 100 females there are 80.9 males.