Boulder Hill South Dakota

Boulder Hill is a census-designated place in Oswego Township, Kendall County, Illinois, United States. Per the 2020 census, the population was 8,394. It is part of the Chicago metropolitan area on the Fox River, south of Aurora.
  • Elevation: 663 ft (202 m)
  • Country: United States
  • State: Illinois
  • County: Kendall
  • Township: Oswego
  • ZIP code: 60538
  • Area code(s): 630, 331
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