Names
- Keniston, Hayward, b. 1883.1
- Kennedy, Richard L.1
- Kenyon, Frederic G., Sir (Frederic George), 1863-1952.1
- King, Clyde Lyndon, 1879-1937.1
- Kline, George Milton, 1878-1
- Knappen, Loyal Edwin, 1854-1930.1
- Kraemer, Casper John, 1895-1958.1
- La Follette, Robert M. (Robert Marion), 1855-1925.1
- LaFollette, Robert Marion, 1855-1925.1
- Lamont, Robert Patterson, 1867-1948.1
- Lamont-Hussey Observatory (University of Michigan)1
- Lane, Robert Porter, 1891-1953.1
- Langer, William L. (William Leonard), 1896-1977.1
- Larson, Laurence Marcellus, 1868-1938.1
- Latane, John Holladay, 1869-1932.1
- Lathrop, Rufus G.1
- Latting, Raymond.1
- Lawton, James Frederick, 1888-1969.1
- LeRoy, James A. (James Alfred), 1875-1909.1
- Lejeune, John Archer, 1867-1942.1