Welcome to the City of Fullerton's official page! Fullerton is a full-service city renowned for its unique mix of residential, business, educational and cultural environments which provide an outstanding quality of life for both residents and businesses alike. City Hall is open Mon - Thurs 7 a.m. to 5:30 p.m. and on alternate Fridays from 7:30 a.m. to 5 p.m. Closed alternate Fridays.