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Gold Country Beginnings and High Sierra Horizons

El Dorado County, California

El Dorado County stretches from California’s western Sierra foothills toward Lake Tahoe, bringing very different elevations and communities into one county. Placerville is the county seat, while Coloma marks the gold discovery that helped trigger the California Gold Rush. The county historical museum offers context for those changes and the people affected by them. A foothill history outing and a high-country visit reveal different parts of this varied Sierra landscape.

El Dorado County at a Glance

Population192,323 (2025 est.)
County SeatPlacerville
Largest communityEl Dorado Hills
Established1850
ZIP CodesSee postal resources
Total Area, Including Water1,786 sq mi (total)
Major RoutesSee transportation resources
Area CodesVaries by community
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El Dorado County

James Marshall's discovery of gold at Coloma in January 1848 helped set off the California Gold Rush. El Dorado County became one of California's original counties in 1850, with Coloma as its first seat; county government moved to Placerville in 1857. That period reshaped a region with much older Indigenous histories. The county's historical museum and archival collections provide ways to explore settlement, transportation and everyday life rather than treating the gold discovery as the whole story.

Placerville's historical museum is a practical starting point for learning about county history, with photographs, maps and other records supporting deeper exploration. Coloma provides a separate focus on the gold-discovery landscape. Farther east, the county reaches the Lake Tahoe region, where elevation and distance make a different kind of itinerary. Choose between a foothill-centered day and a high-country outing before combining stops, so the county's geography works with your plans.

What Shapes Us

Coloma's Turning Point

The 1848 gold discovery at Coloma links a specific place with a far-reaching historical event, providing an entry point to the region's rapid nineteenth-century changes.

County Collections

The El Dorado County Historical Museum preserves photographs, maps and records that help connect broad historical events with the experiences of local communities.

A Sierra Transect

The county spans foothill communities and high-country landscapes toward Lake Tahoe, making elevation and travel distance essential parts of understanding its different destinations.

Follow the Sierra from foothill stories to mountain horizons.
El Dorado County headlines via Google News

Former firefighter convicted of planting explosives near Sacramento-area roadways - Sacramento Bee

Former firefighter convicted of planting explosives near Sacramento-area roadways  Sacramento Bee

Read the Story Nov 2, 2026 • 2 min read
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County Resources

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Get to Know El Dorado County

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Local Questions

El Dorado County Questions, Answered

Explore practical details about the county and the organizations that serve it.

192,323 (July 1, 2025 Census estimate). This is a dated Census Bureau estimate, rather than a live resident count.

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Meet Local Businesses

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Local Businesses

Businesses Serving El Dorado County

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Businesses serving El Dorado County

Additional county facts: county overview and references.

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