JoinCalifornia, started in 2005, provides more than one hundred years worth of political history for California candidates, districts, and parties. The JoinCalifornia database currently contains state legislative races since 1898, and federal and statewide offices going back to 1849. This information includes 13,402 candidates running in 24,152 races in 493 elections.

The biographies and data at have been used to write nine books and cited by the San Jose Mercury News, Sacramento Bee, Orange County Register, La Opinion, Capitol Weekly, Santa Cruz Sentinel, and Ballot Access News.