38 articles
Santa Fe County
Santa Fe County, New Mexico: county seat Santa Fe, the state capital. Established 1852 in New Mexico Territory; 154,823 residents (2020 census), 1,910.38 sq mi of land, FIPS 35049.
Snohomish County, Washington
Snohomish County, Washington: Puget Sound county created January 14, 1861 from Island County, seat at Everett, population about 870,000 (2025), home of Boeing Commercial Airplanes headquarters.
Solano County, California
Solano County, California: county established February 18, 1850 as one of the original 27 California counties, named for Chief Solano (Sem Yeto); county seat Fairfield; population 453,491 (2020).
Tulare County, California
Tulare County, California: Central Valley county created 1852, seat Visalia, population about 485,000. Top US agricultural county ($8.6 billion 2022 crop value, milk leading); named for drained Tulare Lake; Tulare Lake Subbasin under SGMA probation since 2024.
Ventura County, California
Ventura County is a Southern California coastal county between Santa Barbara and Los Angeles counties. Its seat is Ventura; strawberries lead a $2.3 billion agriculture industry.
Washoe County, Nevada
Washoe County, Nevada: northwestern Nevada county founded November 25, 1861, seat Reno. Population 509,386 (2025 est.), 6,315.88 square miles, includes Reno-Sparks metro and Lake Tahoe shore.
Yolo County
Yolo County, California: original 1850 county in the Sacramento Valley west of Sacramento; seat Woodland; cities Davis, West Sacramento, Winters, Woodland; 216,403 residents (2020); agriculture and UC Davis dominate.
Yuma County, Arizona, United States
Yuma County, Arizona: southwestern Arizona county on the Colorado River, county seat Yuma, one of four original 1864 counties; 224,449 residents (2025 est.), winter-vegetable agriculture, MCAS Yuma, Yuma Proving Ground, Mexico border ports.