US State Geological Maps

Explore the geology of the United States with our collection of state geological maps. Discover the rock types, formations, and geological ages that reveal how each state’s landscape developed over millions of years.

Combining colorful cartography with scientific detail, these maps offer a fascinating resource for geologists, students, educators, and map collectors—and a distinctive display for your home, classroom, or office. Browse the collection to explore your state’s geological story.