Fullerton is a city located in northern Orange County, California, USA. As of the 2000 census, the city had a total population of 126,003.
It was founded in 1887 by George and Edward Amerige and named for George H. Fullerton, who secured the land on behalf of the Atchison, Topeka and Santa Fe Railway. Historically it was a center of agriculture, notably groves of Valencia oranges and other citrus crops; petroleum extraction; transportation; and manufacturing. It is home to several educational institutions, notably the California State University, Fullerton (CSUF).