Grassy Lake

Grassy Lake may refer to:


 * Grassy Lake, Alberta, a hamlet in Canada
 * Grassy Lake in Faulkner County, Arkansas
 * Grassy Lake Dam, a small dam in Wyoming
 * Grassy Lake (Florida), a lake in Highlands County, Florida
 * Grassy Lake Preserve, a protected area in Florida
 * Grassy Lake (Louisiana), a lake in St. Martin and Assumption Parishes
 * Little Grassy Lake (Florida), a lake in Highlands County, Florida
 * Little Grassy Lake (Illinois), a reservoir in southern Illinois