Lassen County, California

Lassen County: County in California, United States


Lassen County is a county located in the U.S. state of California. As of the 2010 census, the population was 34,895 and a population density of 3 people per km². After 10 years in 2020 county had an estimated population of 30,016 inhabitants. Its county seat is Susanville. The county was created 160 years ago in 1863.

Lassen County locator map
Location of Lassen County on California map.

Quick Facts about Lassen County

Population : 30,016 (2020)
Country : United States of America
State : California (United States)
Area : 12226 km2
Water as percent of area : 3.46%
Land as percent of area : 96.54%
Named for : Peter Lassen
Altitude : 6,680 feet / 2036 meters
Capital : Susanville
Establishment : January 01, 1864
Time Zone : America/Los_Angeles
Local time : 08:16:00 (2nd March 2024)
Density : 2 Pop. per km² as of 2020
Population growth : -16.25% (2010-2020)
Lassen County Courthouse image
Lassen County Courthouse
Lassen County Courthouse image


Lassen County is located at 40°40'25"N 120°35'40"W (40.6735900, -120.5943300). It has 4 neighbors: Plumas County, Modoc County, Shasta County and Washoe County.

Lassen County map

The largest city of Lassen County is Susanville with a population of 14,425. . See all Lassen County cities & populated places.

Lassen County Populated Places

Cities, towns, neighborhoods & other populated places in Lassen County.

City Name Population Title
Susanville 14,425 County seat of Lassen County, California, United States

Lassen County has 4 neighbours.

  • Susanville


According to census records, the population of Lassen County decreased by 16.25% in 10 years.

Year Population % Change Method
2010 34,895 - census
2011 34,246 -1.9% estimation process
2012 33,629 -1.83% estimation process
2013 32,129 -4.67% estimation process
2014 31,664 -1.47% estimation process
2015 31,256 -1.31% estimation process
2016 30,721 -1.74% estimation process
2017 30,920 0.64% estimation process
2018 30,618 -0.99% estimation process
2019 30,573 -0.15% estimation process
2020 30,016 -1.86% estimation process

Comte de Lassen, Comté de Lassen, Condado de Lassen, Condado han Lassen, Contea di Lassen, Hrabstwo Lassen, Lassen, Lassen Comitatus, Lassen Kun, Lassen Kūn, Lassen konderria, Lassen megye, Lassen srjan, Lasseni maakond, Lasun, Okrug Lasen, Quan Lassen, Quận Lassen, la sen xian, las'sena ka'unti, mqatʿt lasyn, rassen jun, shhrstan lasn kalyfrnya, Лассен, Ласън, Округ Ласен, Լասսեն շրջան, شهرستان لاسن، کالیفرنیا, لاسین کاؤنٹی، کیلیفورنیا, لیسن کاؤنٹی, مقاطعة لاسين, লাস্সেন কাউন্টি, ラッセン郡, 拉森县

People born in Lassen County (1)

American actor Claude Johnson was born in Lassen County

California Other Counties (more counties)

County Name Population Title
Los Angeles County 9,943,046 County in California, United States of America
Los Angeles 3,970,219 The second most populous city in the United States and the center of the Los Angeles metropolitan area.
San Diego County 3,332,427 San Diego County, founded in 1850, is one of 58 counties in the US state of California.
Orange County 3,166,857 County in California, United States
Riverside County 2,489,188 County in California, United States
San Bernardino County 2,189,183 County in California, United States
Santa Clara County 1,907,105 County in California, United States
Alameda County 1,662,323 County in California, United States
Sacramento County 1,559,146 County in California, United States
San Diego 1,422,420 The eighth most populous city in the United States and the center of the San Diego metropolitan area.
Laguna 1,370,232 A city located in Orange County, California.
Contra Costa County 1,152,333 County in California, United States
San Jose 1,013,616 The tenth most populous city in the United States and the center of the San Jose metropolitan area.
Fresno County 1,000,918 County in California, United States
Kern County 901,362
San Francisco County 866,606 County, coextensive with the city of San Francisco, California, United States