Sacramento County is a county located in the U.S. state of California. As of the 2020 census, the population was 1,585,055. Its county seat is Sacramento, which has been the state capital of California since 1854.
Colusa County is a county located in the U.S. state of California. As of the 2020 census, the population was 21,839. The county seat is Colusa. It is in the northern Sacramento Valley, northwest of the state capital, Sacramento.
Humboldt County is a county located in the U.S. state of California. As of the 2020 census, the population was 136,463. The county seat is Eureka.
Kern County is a county located in the U.S. state of California. As of the 2020 census, the population was 909,235. Its county seat is Bakersfield.
Lake County is a county located in the north central portion of the U.S. state of California. As of the 2020 census, the population was 68,163. The county seat is Lakeport. The county takes its name from Clear Lake, the dominant geographic feature in the county and the largest non-extinct natural lake wholly within California.
Madera County, officially the County of Madera, is a county at the geographic center of the U.S. state of California. As of the 2020 census, the population was 156,255. The county seat is Madera.
Mendocino County is a county located on the North Coast of the U.S. state of California. As of the 2020 census, the population was 91,601. The county seat is Ukiah.
Nevada County is a county located in the U.S. state of California, in the Sierra Nevada. As of the 2020 census, its population was 102,241. The county seat is Nevada City. Nevada County comprises the Truckee-Grass Valley micropolitan statistical area, which is also included in the Sacramento-Roseville combined statistical area, part of the Mother Lode Country.
Plumas County is a county in the Sierra Nevada of the U.S. state of California. As of the 2020 census, the population was 19,790. The county seat is Quincy, and the only incorporated city is Portola. The largest community in the county is East Quincy. The county was named for the Spanish Río de las Plumas, which flows through it. The county itself is also the namesake of a native moth species, Hadena plumasata.
Siskiyou County is a county located in the northernmost part of the U.S. state of California. As of the 2020 census, the population was 44,076. Its county seat is Yreka and its highest point is Mount Shasta. It falls within the Cascadia bioregion.
Trinity County is a county located in the northwestern portion of the U.S. state of California. Trinity County is rugged, mountainous, heavily forested, and lies along the Trinity River within the Salmon and Klamath Mountains. It is also one of three counties in California with no incorporated cities.
Tulare County is a county located in the U.S. state of California. As of the 2020 census, the population was 473,117. The county seat is Visalia. The county is named for Tulare Lake, once the largest freshwater lake west of the Great Lakes. Drained for agricultural development, the site is now in Kings County, which was created in 1893 from the western portion of the formerly larger Tulare County.
Gridley is a city in Butte County, California, United States, 29 miles south of Chico, California and 56 miles north of Sacramento, California. The population as of April 1, 2020 is 7,421. California State Route 99 runs through Gridley and Interstate 5 and California State Route 70 are both nearby.
Concord is the most populous city in Contra Costa County, California, United States. According to an estimate completed by the United States Census Bureau, the city had a population of 129,295 in 2019, making it the eighth largest city in the San Francisco Bay Area. Founded in 1869 as Todos Santos by don Salvio Pacheco II, a noted Californio ranchero, the name was later changed to Concord. The city is a major regional suburban East Bay center within the San Francisco Bay Area, and is 29 miles east of San Francisco.
Blue Lake is a city in Humboldt County, California, United States. Blue Lake is located on the Mad River in a deep valley, 16 miles (26 km) northeast of Eureka, at an elevation of 131 feet. Its population is 1,208 as of the 2020 census, down from 1,253 from the 2010 census.
Seeley is a census-designated place (CDP) in Imperial County, California. Seeley is located 7.5 miles (12 km) west of El Centro. The population was 1,823 at the 2010 census, up from 1,624 in 2000. It is part of the El Centro Metropolitan Area.
Upper Lake is a census-designated place (CDP) in Lake County, California, United States. Upper Lake is located 8 miles (13 km) north of Lakeport, at an elevation of 1,345 feet (410 m). The population was 1,052 at the 2010 census, up from 989 at the 2000 census. The Habematolel Pomo of Upper Lake are headquartered here.
Lake Forest is a city in Orange County, California, United States. The population was 85,858 at the 2020 census.
Riverside County is a county located in the southern portion of the U.S. state of California. As of the 2020 census, the population was 2,418,185, making it the fourth-most populous county in California and the 10th-most populous in the United States. The name was derived from the city of Riverside, which is the county seat.
The Blue Lakes are a string of two or three lakes in Lake County, California, set in a deep canyon. At one time they seem to have been in the Russian River watershed, but a recent geological upheaval cut them off from that basin and they now drain via Scotts Creek into Clear Lake in the Sacramento River basin. In the 19th and early 20th centuries there were several resorts around the lakes. Their waters have been highly altered by human activity and most of their native fish are lost, but they have a healthy population of largemouth bass.
