The Political Graveyard: El Dorado County
- Political history site provides demographic summary, names and brief biographies of politicians who were born, lived or died in the county.
- http://politicalgraveyard.com/geo/CA/ED.html

California State Historical Landmarks in El Dorado County
- Lists 25 official state historical landmarks in the County. For most landmarks there is a link to a page with photos and more information.
- http://www.donaldlaird.com/landmarks/counties/El_Dorado.html

SpectraGold Productions
- Book "El Dorado County Historic Places of Interest, Myths & Legends." Site includes photos, description of book, list of links to other websites with related history.
- http://www.spectragold.com/