The San Joaquin County Historical Society focuses on preserving and revealing the history of San Joaquin county and operates the Museum under an agreement with the County of San Joaquin.  Here is some information on the county.

San Joaquin county is one of the original California counties, created in 1850 at statehood.  It is named for one of its major waterways, the San Joaquin River.  The county covers 1,426 square miles (3,694 km) and has a population of about 685,000 (2010).

Agriculture continues to be the mainstay of the county's economy. According to the 2010 Agriculture Commissioner's Crop Report the top crops were: milk worth $341.3 million, grapes $248.9 million, walnuts $207.2 million, cherries $184.5 million, almonds $156.8 million, tomatoes $115.7 million, cattle and calves $60.1 million, hay $59.7 million, and apples $52.1 million. Compared to other California counties, San Joaquin was the leading producer of walnuts, asparagus, cherries, apples, corn (grain), blueberries, and pumpkins. It was in the top three counties in the production of wine grapes, canning tomatoes, fresh tomatoes, olives, dry beans, potatoes, safflower, and watermelons.

Tourism is an emerging industry in northern San Joaquin county, primarily due to the Lodi wine appellation and the efforts of the Lodi-Woodbridge Winegrape Commission, the Lodi Convention and Visitors Bureau, and the Stockton Convention and Visitors Bureau.

Official San Joaquin County Website
San Joaquin Farm Bureau Federation

Stockton Chamber of Commerce
Lodi Chamber of Commerce
Tracy Chamber of Commerce
Manteca Chamber of Commerce
Lathrop Chamber of Commerce
Ripon Chamber of Commerce
Escalon Chamber of Commerce
Linden-Peters Chamber of Commerce
Clements-Lockeford Chamber of Commerce