The map collection contains "...more than 250,000 maps, yet less than 20% of the collection is currently online."

Includes more than 38,000 maps from the David Rumsey collection, focusing on "...rare 18th and 19th century maps of North and South America, although it also has maps of the World, Asia, Africa, Europe, and Oceania. The collection includes atlases, wall maps, globes, school geographies, pocket maps, books of exploration, maritime charts, and a variety of cartographic materials including pocket, wall, children's, and manuscript maps."