Fremont is a city in Alameda County, California. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs. The city is named after John Charles Frémont, "the Great Pathfinder."

Fremont is located in the southeast section of the San Francisco Bay Area. Fremont is now the fourth most populous city in the San Francisco Bay Area, and the largest suburb in the metropolis. It is the closest Alameda County city to Silicon Valley, and is thus sometimes associated with it.