Historedia
AmericasEvent

Placer County, California formed with Auburn as seat

When
1851
Where
Placer County; Auburn
Episodes
2

Placer County, California, was established on April 25, 1851, from territories previously belonging to Sutter and Yuba Counties. The newly formed county designated Auburn as its seat, reflecting the town's growth as a mining camp named in 1849. This administrative change occurred shortly after California's statehood, separating Placer from its parent counties.

Episodes

  1. 1851 · AuburnAuburn as County Seat

    Auburn was chosen as the seat of Placer County in 1851, following its development as a mining camp named in 1849.

  2. 1851-04-25 · Placer CountyFormation of Placer County

    Placer County was officially formed on April 25, 1851, from parts of Sutter and Yuba Counties, with Auburn designated as the county seat.

Background and detail

Background. Placer County was formed from parts of Sutter and Yuba Counties. Yuba County, one of California's original counties created in 1850, transferred territory to Placer in 1851. Sutter County, also an original county created in 1850, contributed territory to Placer County, though sources note this transfer occurred in 1852.

Seat Selection. Auburn, officially named in August 1849 by miners from Auburn, New York, developed into a mining camp. By 1850, the town's population reached approximately 1,500 people. In 1851, Auburn was chosen as the seat of Placer County, establishing its administrative role within the newly formed jurisdiction.

Territorial Changes. The formation of Placer County involved the redistribution of land from existing counties. Yuba County, formed in 1850, gave parts of its territory to Placer County in 1851. Sutter County, also formed in 1850, transferred parts of its territory to Placer County, with sources indicating this transfer occurred in 1852.

Sources

  1. Placer County, California Wikipedia, revision of 2026-09-29
  2. Auburn, California Wikipedia, revision of 2026-10-04
  3. Yuba County, California Wikipedia, revision of 2026-10-04
  4. Sutter County, California Wikipedia, revision of 2026-09-27

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.