Keystone

Population

352 (2020)

Type

Town

Area

3 sq mi (7.77 km²)

Median age

50.5

Households

375

Persons per household

2.2

Median household income

$60,625

Average house value

$248,500

Businesses

71

Employees

301

Government

TOWN OF KEYSTONE

Government office

PO BOX 689, KEYSTONE, SD 57751