Originally chartered in 1938, and now the largest community Credit Union headquartered in Orange County, Orange County’s Credit Union serves more than 115,000 Members with access to 30,000 CO-OP Network ATMs, Online and Mobile banking, as well as investment options, auto loans, and mortgages. Anyone who lives or works in Orange, Los Angeles, Riverside and San Bernardino Counties, CA can bank with us. Membership is $5.