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- United States. Soil Conservation Service (557)
- Mercator, Gerhard, 1512-1594 (354)
- Ortelius, Abraham, 1527-1598 (245)
- Hondius II, Jocodus (1593-1633) (224)
- Bertius, Petrus, 1565-1629 (220)
- University of Minnesota (162)
- Mechlin, Christian (144)
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- Münster, Sebastian (1489-1552) (123)
- United States. General Land Office (114)
- Bordon, Benedetto, 1450-1530 (112)
- Apian, Peter, 1495-1552 (98)
- Speed, John, 1552?-1629 (86)
- Rand McNally and Company (85)
- Wit, Frederik de (c. 1629-1706) (84)
- Sanson, Nicolas, 1600-1667 (80)
- Honter, Johannes, 1498-1549 (67)
- England. Research Department, Foreign Office. (65)
- Aa, Pieter van der, 1659-1733 (63)