California Department of Transportation Cost Data
 

District/County Map

Use the map or the table below to determine the abbreviation for a particular county, or which Caltrans district a county is in.

Map of Districts and Counties
COUNTYDISTRICTABBREV.
Alameda4ALA
Alpine10ALP
Amador10AMA
Butte3BUT
Calaveras10CAL
Colusa3COL
Contra Costa4CC
Del Norte1DN
El Dorado3ED
Fresno6FRE
Glenn3GLE
Humboldt1HUM
Imperial11IMP
Inyo9INY
Kern6KER
Kings6KIN
Lake1LAK
Lassen2LAS
Los Angeles7LA
Madera6MAD
Marin4MRN
Mariposa10MPA
Mendocino1MEN
Merced10MER
Modoc2MOD
Mono9MNO
Monterey5MON
Napa4NAP
Nevada3NEV
Orange12ORA
Placer3PLA
Plumas2PLU
Riverside8RIV
Sacramento3SAC
San Benito5SBT
San Bernardino8SBD
San Diego11SD
San Francisco4SF
San Joaquin10SJ
San Luis Obispo5SLO
San Mateo4SM
Santa Barbara5SB
Santa Clara4SCL
Santa Cruz5SCR
Shasta2SHA
Sierra3SIE
Siskiyou2SIS
Solano4SOL
Sonoma4SON
Stanislaus10STA
Sutter3SUT
Tehama2TEH
Trinity2TRI
Tulare6TUL
Tuolumne10TUO
Ventura7VEN
Yolo3YOL
Yuba3YUB