Shortage of officials is at a crisis level across the nation, including California. Below is a list of officials associations in the state with relevant contact information.
Battlefields
to Ballfields
Providing
veterans an opportunity to integrate back into their communities through sports
officiating 
https://www.battlefields2ballfields.org/
 
Bay
Area Sports Officials (BASO)
Serving
the San Jose area and Santa Clara Valley for the following sports:
Baseball,
Basketball, Field Hockey, Football, Soccer, Softball, Volleyball and Wrestling
Contact:
Rick Moore, 408-504-8852
or rrmore1026@yahoo.com
 
Channel Coast Football Officials Association
Serving student-athletes throughout Ventura County and Santa
Barbara County
  Membership application
  
 
East
Bay Football Officials Association
Serving
the Eastern San Francisco Bay from Vallejo to Hayward
  https://www.ebfoa.com
 
High School Football Officials Academy
Serving
Los Angeles County area schools
http://www.hsfoacademyzebras.com
Contact:  Chris Maher – Secretary/Treasurer, hsfoa@yahoo.com
 
Kern County Officials Association 
Serving the high schools and youth of greater Bakersfield in the
San Joaquin Valley 
www.kcoafootball.com
 
Long
Beach Football Officials Association
Serving
Southeast Los Angeles County (Long Beach to Whittier)
  www.lbfoa.org
 or ayball1@aol.com
Los Padres Football Officials Association
Serving the Northern Santa Barbara and San Luis Obispo Counties
  www.lpfoa.
com
Contact:  Jerry Mrozek, jlmrozek@verizon.net 
Mission Valley Football Officials Association
Serving the Tri-City (Fremont, Newark, Union City) and Hayward
area
  http://mvfoa.com/
 
Mojave
Desert Officials Association
Providing
Officials for the Antelope and Owens Valleys  
  http://www.mojavedesertofficials.com/
 or MDOAinfo@gmail.com
 
Nor-Cal Football Officials Association
Serving the Humboldt-Del Norte League
ncfoa.humboldt@gmail.com
 
Northern California Football Officials Association.
Serving the San Francisco City
  https://www.ncfoa.org/
 
Northern
California Officials Association (NCOA)
Serving
Sacramento, Sutter, Yuba, Nevada, El Dorado, Yolo, Solano, Napa, and Placer
Counties
Football,
Baseball, Basketball, Soccer, Softball, Volleyball and Wrestling
Refwithus.com or info@ncoa.info
 
Northern California Officials Association - Chico
Serving the Northern Section in Butte, Colusa, Glenn, Lassen,
Sutter, Yolo, Yuba areas for football
https://www.ncoa-chico.org
 
Northern California Official Association - Yuba City
Serving the CIF Northern Section in Colusa, Sutter, Yolo and
Yuba counties for baseball and softball
https://www.ncoa-yc.com
 
NCOA South Football Officials Association 
Serving the following areas in the Southern Sac-Joaquin Section
in the Central Valley:  Stockton, Lodi,  Modesto,  Jackson,
Sonora, Merced, Mariposa,  Tracy
ncoafbsouth.org
 
Northern Nevada Football Officials Association
Serving the Reno, Sparks, Carson City, Fallon, Lyon County,
Dougals County, Lovelock areas and Tahoe-Truckee School District.
  Northern Nevada Football
Officials Association
 
Orange
County Football Officials Association
Serving
all of Orange County
  https://ocfoa.org/information/new-officials-2/
Please
fill out the "For More Information" form at the bottom page to be
contacted.
 
Peninsula Sports, Inc.
Serving schools from King County to north to Morgan Hill and
over to the Santa Cruz Coast in 9 different sports
Contact: Tom Emery (831) 241-1101 or www.PSIrefs.com
 
Redwood Empire Officials Association
Serving Mendocino County 
Facebook at Redwood Empire Officials Association LTD or reoaofficials@yahoo.com
 
San Diego County Football Officials Association
Serving all of San Diego County
  https://www.sdcfoa.org/
 
San Fernando Valley Football Officials Association 
Serving the San Fernando and Santa Clarita Valleys
  www.sfvfootballunit.org
 
San
Gabriel Valley Football Officials Association
Serving
Pasadena to the 605, and La Canada to the 60
  https://www.sgvfoa.com/bearef