Rancho Campo de los Franceses was a 48,747-acre (197.27 km2) Mexican land grant in present-day San Joaquin County, California given in 1844 by Governor Manuel Micheltorena to Guillermo Gulnac. "Campo de los Franceses” which in English means “French Camp” refers to French-Canadian fur trappers who wintered there. The grant included present-day French Camp and Stockton.

San Joaquin County, officially the County of San Joaquin, is a county located in the U.S. state of California. As of the 2020 census, the population was 779,233. The county seat is Stockton.