Lake County may refer to:
New Zealand Lake County, New Zealand
United States Lake County, California Lake County, Colorado Lake County, Florida Lake County, Illinois Lake County, Indiana Lake County, Michigan Lake County, Minnesota Lake County, Montana Lake County, Ohio Lake County, Oregon Lake County, South Dakota Lake County, Tennessee
See also Lake (disambiguation) Lake and Peninsula Borough, Alaska Lake Township (disambiguation) Lake of the Woods County, Minnesota Bear Lake County, Idaho Oceana County, Michigan Green Lake County, Wisconsin Red Lake County, Minnesota Salt Lake County, Utah