California Counties

Transcribed Counties are underlined.

Starred Counties have been proofread and reformatted

 ~IMPERIAL  County~

Imperial County did NOT exist prior to 1907 and therefore we do not include it. It was formed in 1907 from the eastern part of San Diego County. Imperial County was the last formed, the 58th of the existing 58 counties. It has neither gained territory nor transferred territory to any other county.

 

   Map of CA Counties    Links to additional Resources  

 

ALAMEDA

KINGS

ORANGE

*SHASTA

ALPINE

*KLAMATH

PLACER

*SIERRA

*AMADOR

LAKE

*PLUMAS 

SISKIYOU

BUTTE

*LASSEN

RIVERSIDE

SOLANO

*CALAVERAS

LOS ANGELES

*SACRAMENTO 

SONOMA

*COLUSA

*MADERA

SAN BENITO

*STANISLAUS 

CONTRA COSTA

*MARIN

SAN BERNARDINO

*SUTTER

*DEL NORTE

*MARIPOSA

*SAN DIEGO

*TEHAMA

*EL DORADO

*MENDOCINO

SAN FRANCISCO

*TRINITY

*FRESNO

*MERCED

SAN JOAQUIN

TULARE

*GLENN

*MODOC 

*SAN LUIS OBISPO

TUOLUMNE

*HUMBOLDT

MONO

SAN MATEO

*VENTURA

IMPERIAL

MONTEREY

SANTA BARBARA

*YOLO 

*INYO 

NAPA

SANTA CLARA

*YUBA 

*KERN  

NEVADA

SANTA CRUZ

 

     

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