ZIP Code 57520
About Agar
Agar is a small town in Sully County, South Dakota, United States. As of the 2020 census, Agar had a population of 68. Agar is a farm/ranch service center.
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Area Profile
US Census (ACS 5-year · Gazetteer)
127
population
$46,875
median household income
1
people / sq mi
$113,800
median home value
$850
median gross rent
63.4
median age
127
housing units
83
households
157.4
land area (sq mi)