ZIP Code 57714
About Allen
Allen is a census-designated place on the Pine Ridge Indian Reservation in Bennett County, South Dakota, United States, that was named for the Allen Township, which it encompasses. As of the 2020 census, the CDP had a population of 460. It is one of two places which are closest to the North American continental pole of inaccessibility.
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Area Profile
US Census (ACS 5-year · Gazetteer)
1,166
population
7
people / sq mi
$110,400
median home value
$615
median gross rent
21.7
median age
198
housing units
179
households
162.1
land area (sq mi)