Texas desert landscape

Arizona

Arizona Chapter
Arizona Student Chapter

California/Nevada

California-Nevada Chapter
Humboldt State University Student Chapter
California Polytechnic State University-San Luis Obispo Earth Student Chapter

Colorado

Colorado Chapter

Hawaii/Guam

Hawaii Chapter

Kansas

Kansas Chapter

Mexico

New Mexico

New Mexico Chapter
New Mexico State Chapter

Oklahoma

Oklahoma Chapter
Oklahoma State Chapter

Texas

Texas Council of Chapters
Post Oak Chapter 
Concho Valley Chapter
South West Chapter
Mid-Gulf Chapter
Greenbelt Chapter
Rolling Plains Chapter
Golden Spread Chapter
Heart of Texas Chapter
East Chapter
North Chapter
Texas A&M Student Chapter

US Pacific Territories

Utah

Utah Chapter