Place
- Iosco1
- Iowa1
- Iron1
- Isle Royale National Park T66N-R34W, Sec. 1, SE of NW.1
- Izard1
- Jackson1
- Jalisco1
- Keweenaw1
- Kings1
- L[ake]. Okoboji.1
- Lake Antoine, Sta. No. 31 T40N, R30W1
- Lake Huron, Manitoulin Island, Smith Bay, Wikwemikong1
- Lake Seneca.1
- Lake below large springs at Hicks' Ranch, 7 miles upstream from junction of Independence Creek & Pecos River.1
- Lakeville Lake1
- Livingston1
- Los Angeles1
- Madison1
- Manistee1
- Manistique Lake1