Glenn County , California

Glenn County: County in California, United States

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


Glenn County is a county located in the U.S. state of California. As of the 2010 census, the population was 28,122 and a population density of 8 people per km². After 10 years in 2020 county had an estimated population of 28,283 inhabitants. Its county seat is Willows. The county was created 130 years ago in 1890.

Seal of Glenn County  California seal image
Seal of Glenn County California
Seal of Glenn County  California seal image


Glenn County is located at 39°35'54"N 122°23'32"W (39.5984000, -122.3922100). It has 5 neighbors: Butte County, Colusa County, Lake County, Mendocino County and Tehama County.

Glenn County map

The largest city of Glenn County is Hamilton City with a population of 169,300. Other cities include, Orland population 8,068 and Willows population 6,036. See all Glenn County cities & populated places.


Glenn County forecast: Rain showers likely before 5am. Mostly cloudy, with a low around 49. more

Glenn County Quick Facts

Population : 28,283 (2020)
Country : United States of America
State : California (United States)
Area : 3437 km2
Water as percent of area : 0.9%
Land as percent of area : 99.1%
Named for : Hugh J. Glenn
Altitude : 860 feet / 262 meters
Capital : Willows
Establishment : January 01, 1891
Time Zone : America/Los_Angeles
Local time : 09:44:14 (27th October 2021)
Density : 8 Pop. per km² as of 2020
Population growth : 0.57% (2010-2020)
Weather : 49℉ Rain Showers Likely 7-days weather

Glenn County has 5 neighbours.

  • Willows


The population of Glenn County increased by 0.57% in 10 years.

Year Population % Change Method
2010 28,122 - census
2011 28,139 0.06% estimation process
2012 27,851 -1.03% estimation process
2013 27,809 -0.15% estimation process
2014 27,831 0.08% estimation process
2015 27,753 -0.28% estimation process
2016 27,840 0.31% estimation process
2017 27,926 0.31% estimation process
2018 27,967 0.15% estimation process
2019 28,393 1.5% estimation process
2020 28,283 -0.39% estimation process

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Other places with the same name (1)

Glenn County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Glenn County.

City Name Population Title
Hamilton City 169,300 Largest city in New Zealand's Waikato region
Orland 8,068 City in Glenn County, California
Willows 6,036 City in California, USA

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 County seat of Los Angeles County, California; second largest city in the United States by population
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 City in San Diego County, California, United States, eighth largest city in the country by population
Laguna 1,370,232 Former census-designated place
Contra Costa County 1,152,333 County in California, United States
San Jose 1,013,616 County seat of Santa Clara County, California; tenth largest city in the United States by population
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