- Lake County Road Commission1
- Lamson, A. C.1
- Lapeer County Road Commission1
- Leelanau County (Mich.)1
- Leelanau County Road Commission1
- Lenawee County (Mich.). Board of County Road Commissioners1
- Lewis, James Otto, 1799-18581
- Lewis, Samuel, fl. 1831 [delineator]1
- Lewiston Boosters1
- Libraries1
- Litzner, L.1
- Livermore, W. R. (William Roscoe), 1843-19191
- Livingston County Road Commission (Mich.)1
- Longyear, John Munro, 1850-1922, compiler1
- Lucas, Fielding, Jr., 1781-18541
- Luce County Road Commission1
- Lyon, Lucius, 1800-18511
- M.M. Dickson & Co.1
- Mackinac County (Mich.)1
- Macomb, J. N. (John N.), 1810 or 1811-18891