Indian Lake is a borough in Somerset County, Pennsylvania, United States. It is part of the Johnstown, Pennsylvania Metropolitan Statistical Area. The population was 391 at the 2020 census, down from 394 in 2010. Indian Lake is home to Indian Lake Golf Club, which opened in 1974, and was the first to be designed by Arnold Palmer, Northwinds Golf Cour…Indian Lake is a borough in Somerset County, Pennsylvania, United States. It is part of the Johnstown, Pennsylvania Metropolitan Statistical Area. The population was 391 at the 2020 census, down from 394 in 2010. Indian Lake is home to Indian Lake Golf Club, which opened in 1974, and was the first to be designed by Arnold Palmer, Northwinds Golf Course, Indian Lake Resort, Indian Lake Marina, and the James W. McIntyre Hiking and Biking Trail.