- Lake Champlain1
- Lake George, Florida, United States1
- Lake Mohawk, Rondout Valley, Ulster County, New York, United States1
- Lake Mohonk, Ulster County, New York, United States1
- Lake Saratoga, Saratoga County, New York, United States1
- Lake Superior1
- Lambertville, Hunterdon County, New Jersey, United States1
- Lamlash Bay, North Ayrshire, Scotland, United Kingdom1
- Lanford Station, South Carolina, United States1
- Leadhills, South Lanarkshire, Scotland, United Kingdom1
- Lewes, Sussex, England, United Kingdom1
- Liberia1
- Limoges, Haute-Vienne, Limousin, France1
- Little Piney, Pulaski County, Missouri, United States1
- Long Branch, Monmouth County, New Jersey, United States1
- Lord Dudley's Mine, Dudley, West Midlands, England, United Kingdom1
- Los Angeles, Los Angeles County, California, United States1
- Louisville, Jefferson County, Kentucky, United States1
- Lubietova, Banskobystricky, Slovakia1
- Lycoming County, Pennsylvania, United States1