Cowlitz County, Washington

Cowlitz County: County in the state of Washington, United States

About

Cowlitz County is a county located in the U.S. state of Washington. As of the 2010 census, the population was 102,410 and a population density of 34 people per km². After 10 years in 2020 county had an estimated population of 111,371 inhabitants. Its county seat is Kelso. The county was created 171 years ago in 1853.

Cowlitz County locator map
Location of Cowlitz County on Washington map.

Quick Facts about Cowlitz County

Population : 111,371 (2020)
Country : United States of America
State : Washington (United States)
Area : 3021 km2
Water as percent of area : 2.2%
Land as percent of area : 97.8%
Named for : Cowlitz people
Altitude : 784 feet / 239 meters
Capital : Kelso
Establishment : January 01, 1854
Time Zone : America/Los_Angeles
Local time : 09:50:19 (22nd February 2025)
Density : 37 Pop. per km² as of 2020
Population growth : 8.05% (2010-2020)
Mount St. Helens3 image
Mount St. Helens3
Mount St. Helens3 image
Mount St. Helens3 image

Geography

Cowlitz County is located at 46°11'36"N 122°40'51"W (46.1932900, -122.6807800). It has 5 neighbors: Columbia County, Clark County, Lewis County, Skamania County and Wahkiakum County.

Cowlitz County map

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The largest city of Cowlitz County is Longview with a population of 38,515. Other cities include, Kalama population 2,844, West Longview population 2,698 and Castle Rock population 2,304. See all Cowlitz County cities & populated places.

Cowlitz County Populated Places

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

City Name Population Title
Longview 38,515 City in Washington state, United States
Kelso 12,438 Town and parish in Scottish Borders, Scotland
Woodland 6,548 Town in Washington state, United States
Longview Heights 3,851 Census designated place
Kalama 2,844 City in Cowlitz County, Washington, United States
West Longview 2,698 Unincorporated community
Castle Rock 2,304 City in Cowlitz County, Washington, United States

Cowlitz County has 5 neighbours.

  • Kelso

Demographics

The population of Cowlitz County increased by 8.05% in 10 years.

Year Population % Change Method
2010 102,410 - census
2011 102,309 -0.1% estimation process
2012 101,663 -0.64% estimation process
2013 101,483 -0.18% estimation process
2014 101,790 0.3% estimation process
2015 102,999 1.17% estimation process
2016 104,740 1.66% estimation process
2017 106,805 1.93% estimation process
2018 108,752 1.79% estimation process
2019 110,593 1.66% estimation process
2020 111,371 0.7% estimation process

Comitatul Cowlitz, Comte de Cowlitz, Comté de Cowlitz, Condado de Cowlitz, Condado han Cowlitz, Contea di Cowlitz, Cowlitz, Cowlitz Kun, Cowlitz Kūn, Cowlitz konderria, Cowlitz megye, Hrabstwo Cowlitz, Kantono Cowlitz, Kaulic, Koulic, Okrug Kaulic, Quan Cowlitz, Quận Cowlitz, ka'ulitaja ka'unti, kao li ci xian, kaurittsu jun, mqatʿt kwlytz, shhrstan kaywlytz washyngtn, Каулиц, Коуліц, Округ Каулиц, شهرستان کائولیتز، واشینگتن, مقاطعة كوليتز, کاولیٹز کاؤنٹی، واشنگٹن, کوولٹز کاؤنٹی, কাউলিটজ কাউন্টি, カウリッツ郡, 考利茨县

Washington Other Counties (more counties)

County Name Population Title
King County 2,274,315 County in the state of Washington, United States
Pierce County 913,890 County in the state of Washington, United States
Snohomish County 830,393 County in the state of Washington, United States
Seattle 769,714 The eighteenth most populous city in the United States and the center of the Seattle metropolitan area.
Spokane County 528,225 County in the state of Washington, United States
Clark County 496,865 County in Washington, United States
Thurston County 294,074 County in the state of Washington, United States
Kitsap County 272,787 County in the state of Washington, United States
Yakima County 251,879 County in the state of Washington, United States
Whatcom County 231,016 County in the state of Washington, United States
Spokane 222,050 The second most populous city in Washington.
Tacoma 219,945 The third most populous city in Washington.
Benton County 206,426 County in Arkansas, United States
Vancouver 186,192 The third most populous city in Washington.
Bellevue 148,073 The most populous city in Washington.
Skagit County 130,789 County in the state of Washington, United States