Colusa County

Colusa County is an administrative division in northern California covering about 1,156 square miles in the Sacramento Valley, with the Sacramento River forming its eastern boundary. The area contains several towns and is dominated by rural landscapes used primarily for farming.

The county was established in 1850 as one of California's original 27 counties and took its name from Rancho Colus, a Mexican land grant given to John Bidwell. This early settlement formed the foundation for its current role as an agricultural region.

The Patwin band of the Wintun people were the original inhabitants here, speaking two dialects of the Southern Wintuan language along the Sacramento River. These ancestral connections continue to shape local identity and place names in the region.

Exploring the region on foot works best during cooler morning or evening hours, as summers can become quite hot. Public transit offers a good option for traveling longer distances between towns.

The area is a major rice producer in the United States, using sophisticated irrigation systems to transform the dry valley into productive fields. Rice cultivation landscapes shape the visual character of the region, especially during growing season.

Location: California

Inception: 1850

Capital city: Colusa

Part of: Sacramento Valley

Shares border with: Glenn County, Yolo County, Butte County, Sutter County, Lake County

Website: http://countyofcolusa.org

GPS coordinates: 39.18000,-122.24000

Latest update: December 14, 2025 20:10