These are the general geographic areas encompassed by each Regional Chapter. You are welcome to join one or more Chapters regardless of where you live or work.

Bay Area Chapter

• Alameda County
• Contra Costa County
• Marin County
• Napa County
• San Francisco County
• San Mateo County
• Santa Clara County
• Solano County
• Sonoma County

Capital Area Chapter

• Amador County
• El Dorado County
• Placer County
• Sacramento County
• Sutter County
• Yolo County
• Yuba County

Inland Empire Chapter

• RIverside County
• San Bernardino County

Los Padres Chapter

• San Luis Obispo County
• Santa Barbara County
• Ventura County

Orange County Chapter

• Orange County

San Diego County Chapter

• San Diego County

San Gabriel Valley Chapter

• Multiple Cities

Steinbeck Chapter

• Monterey County
• San Benito County
• Santa Cruz County

Yosemite Chapter

• Alpine County
• Calaveras County
• Merced County
• San Joaquin County
• Stanislaus County
• Tuolumne County