what county is fremont california in?
Fremont, California. Homefacts City Report. Fremont is located in Alameda County, CA. The population is 222,001, making Fremont the 2nd largest city in Alameda County. There are 47 public schools in Fremont with an average Homefacts rating of A. The total crime rate for Fremont is low, and there are 119 registered sex offenders residing in the city.