Lake Nineteen also known as Nineteen Lake, is a 26-acre (11 ha) lake that is located in south-western Schoolcraft County, Michigan in the Hiawatha National Forest.

[2] It is east of the county line with Alger and north of the county line with Delta County.

Nearby lakes include Hugaboom Lake, Mowe Lake, Blue Lake, Corner-Straits Chain of lakes, Ironjaw Lake, Verdant Lake, and Round Lake.