ZIP Code 52249
About Keystone
Keystone is a city in Benton County, Iowa, United States. The population was 599 at the time of the 2020 census. It is part of the Cedar Rapids Metropolitan Statistical Area.
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Area Profile
US Census (ACS 5-year · Gazetteer)
1,106
population
$77,500
median household income
22
people / sq mi
$154,400
median home value
$992
median gross rent
40.5
median age
423
housing units
406
households
49.9
land area (sq mi)