- J.H. Colton & Co1
- Jackson Bros. (Photographers)1
- Jackson, William Henry, 1843-19421
- James, Edwin, 1797-1861, compiler1
- Jeremiah Gurney & Son1
- Jones, W. R1
- Kelloggs & Comstock, lithographer1
- Kinzie, John H., Mrs., 1806-18701
- Kleinschmidt, Johann Jakob, d. 17721
- L. S1
- La Roche, Frank, 1853-19341
- Langlume, fl. 1822-18251
- Le Jeune, Paul, 1592-16641
- Lindestroem, Peter Martensson, 1632-16911
- Locke, H. R., photographer1
- Magoffin, Susan Shelby, 1827-18551
- Martin's Art Gallery1
- Matteson, Sumner W., 1867-19201
- Mautz, Carl, collector1
- Maynard, Hannah, 1834-19181
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