Records of El Dorado County, California, chiefly dating from 1850 to 1890, including county court documents, ledger books and other business records, mining papers, land records, school records, treasury records (including tax rolls and assessment rolls), and merchandising accounts (principally for mining camps). Many of the mining papers and records are from the El Dorado Water and Deep Gravel Mining Company.

One of the original 27 counties of California, El Dorado County was created in 1850 at the time of statehood with Coloma as the county seat. It is in the Sierra Nevada east of Sacramento, in the heart of the gold mining country. Placerville, which had been known as Hangtown due to the numerous hangings in the town, was incorporated in 1854 and became the county seat in 1857.

Approximately 1,600 pieces (consisting of 183 volumes; 14 document boxes; and 1 oversized box) 23 linear ft.

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