- 3 Knowledge
- 1 Knowles, James Sheridan, 1784-1862
- 2 Knowles, John, 1810 or 1811-1880
- 1 Knox Street
- 1 Knoxville, Tennessee
- 2 Koberger, Anton, approximately 1440-1513
- 1 Koch & Bein
- 2 Kohler & Frohling
- 2 Kokomo, Indiana
- 4 Kolb, G. & W. Fire Brick Works
- 1 Kolle, Ann
- 4 Kolle, Henry William
- 7 Kollner, Augustus, b. 1813
- 1 Kolskiy Poluostrov, Russia
- 2 Kongsberg Solvverk
- 2 Kongsberg, Norway
- 10 Konigl Porzellan
- 19 Korans
- 2 Korean Peninsula
- 1 Kosovo
- 1 Kownatsky, Harry, 1914-2003
- 3 Krail Street
- 2 Krakovitz, M. & Son (glass warehouse & mirror factory)
- 1 Krauth, Charles P. (Charles Porterfield), 1823-1883
- 1 Krout and Fite Manufacturing Co. (tapes, braids laces)
- 1 Krumbhar's Bleaching Works
- 9 Krupp's guns
- 1 Krupp'sche Gusstahlfabrik (Essen, Germany)
- 3 Kufic
- 1 Kugler's Restaurant.
- 1 Kuhn, Hartman, 1784-1860
- 8 Kulliyat-i Sa'di
- 13 Kulp, David, 1777-1834
- 1 Kulp's Mill
- 1 Kuppinger and Ellis Furniture & Bedding (Firm)
- 1 Kuril'skiye Ostrova, Russia
- 1 Kutztown (Pa.)—History
- 1 Kutztown, Pennsylvania
- 1 L. Baudoux & Co.
- 1 L. Becker Importer of Wines Liquors & Cigars (Firm)
