California

Eleven regions on county lines: North Coast, Far North, Sacramento Valley, Sierra Nevada, Eastern Sierra, Bay Area, Central Coast, San Joaquin Valley, Los Angeles area, San Diego County and Inland Empire/Deserts.

In the editor each region takes a level with one click. When one region needs more detail, split it into its counties and set them one by one; merge it back when they agree.

Regions in this starter map

• North Coast5 countiesDel Norte County · Humboldt County · Mendocino County · Lake County · Trinity County
• Far North6 countiesSiskiyou County · Modoc County · Shasta County · Lassen County · Tehama County · Plumas County
• Sacramento Valley7 countiesSacramento County · Yolo County · Sutter County · Yuba County · Butte County · Glenn County · Colusa County
• Sierra Nevada8 countiesSierra County · Nevada County · Placer County · El Dorado County · Amador County · Calaveras County · Tuolumne County · Mariposa County
• Eastern Sierra3 countiesAlpine County · Mono County · Inyo County
• Bay Area9 countiesSan Francisco County · San Mateo County · Santa Clara County · Alameda County · Contra Costa County · Marin County · Sonoma County · Napa County · Solano County
• Central Coast5 countiesSanta Cruz County · Monterey County · San Benito County · San Luis Obispo County · Santa Barbara County
• San Joaquin Valley8 countiesSan Joaquin County · Stanislaus County · Merced County · Madera County · Fresno County · Kings County · Tulare County · Kern County
• Los Angeles area3 countiesLos Angeles County · Orange County · Ventura County
• San Diego County1 countySan Diego County
• Inland Empire/Deserts3 countiesRiverside County · San Bernardino County · Imperial County

County lines from the Census Bureau, coastline from Natural Earth.