United States physiographic region

Laurentian Highlands

1. Superior Upland

Atlantic Plain

2. Continental Shelf (not on map)

3. Coastal Plain

3a. Embayed section

3b. Sea Island section

3c. Floridian section

3d. East Gulf Coastal Plain

3e. Mississippi Alluvial Plain

3f. West Gulf Coastal Plain

Appalachian Highlands

4. Piedmont province

4a. Piedmont Upland

4b. Piedmont Lowlands

5. Blue Ridge province

5a. Northern section

5b. Southern section

6. Valley and Ridge province

6a. Tennessee section

6b. Middle section

6c. Hudson Valley

7. St. Lawrence Valley

7a. Champlain section

7b. Northern section (not on map)

8. Appalachian Plateaus province

8a. Mohawk section

8b. Catskill section

8c. Southern New York section

8d. Allegheny Plateau section

8e. Kanawha section

8f. Cumberland Plateau section

8g. Cumberland Mountain section

9. New England Province

9a. Seaboard Lowland section

9b. New England Upland section

9c. White Mountain section

9d. Green Mountain section

9e. Taconic section

10. Adirondack province

Interior Plains

11. Interior Low Plateaus

11a. Highland Rim section

11b. Lexington Plain

11c. Nashville Basin

12. Central Lowland

12a. Eastern Lake section

12b. Western Lake section

12c. Wisconsin Driftless section

12d. Till Plains

12e. Dissected Till Plains

12f. Osage Plains

13. Great Plains province

13a. Missouri Plateau, glaciated

13b. Missouri Plateau, unglaciated

13c. Black Hills

13d. High Plains

13e. Plains Border

13f. Colorado Piedmont

13g. Raton section

13h. Pecos Valley

13i. Edwards Plateau

13j. Central Texas section

Interior Highlands

14. Ozark Plateaus

14a. Springfield-Salem plateaus

14b. Boston Mountains

15. Ouachita province

15a. Arkansas Valley

15b. Ouachita Mountains

Rocky Mountain System

16. Southern Rocky Mountains

17. Wyoming Basin

18. Middle Rocky Mountains

19. Northern Rocky Mountains

Intermontane Plateaus

20. Columbia Plateau

20a. Walla Walla Plateau

20b. Blue Mountain section

20c. Payette section

20d. Snake River Plain

20e. Harney section

21. Colorado Plateaus

21a. High Plateaus of Utah

21b. Uinta Basin

21c. Canyon Lands

21d. Navajo section

21e. Grand Canyon section

21f. Datil section

22. Basin and Range province

22a. Great Basin

22b. Sonoran Desert

22c. Salton Trough

22d. Mexican Highland

22e. Sacramento section

Pacific Mountain System

23. Cascade-Sierra Mountains

23a. Northern Cascade Mountains

23b. Middle Cascade Mountains

23c. Southern Cascade Mountains

23d. Sierra Nevada

24. Pacific Border province

24a. Puget Trough

24b. Olympic Mountains

24c. Oregon Coast Range

24d. Klamath Mountains

24e. California Trough

24f. California Coast Ranges

24g. Los Angeles Ranges

25. Lower California province