Old Mill Creek Lake CountyIllinois www.villageofoldmillcreek.org Map Population 165 (2020)Type VillageArea 10.67 sq mi (27.64 km²), 0.17 sq mi waterGovernment VILLAGE OF OLD MILL CREEKGovernment office 40870 N HUNT CLUB RD, OLD MILL CREEK, IL 60083