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Campbell County
Campbell County
County
	Campbell County Courthouse
	Flag
	Location within the U.S. state of Wyoming
	Wyoming's location within the U.S.
	Coordinates: 44°14′N 105°33′W / 44.24°N 105.55°W
Country	United States
State	Wyoming
Founded	February 21, 1911
Named for	Robert Campbell
Seat	Gillette
Largest city	Gillette
Area
• Total	4,807 sq mi (12,450 km2)
• Land	4,803 sq mi (12,440 km2)
• Water	4.0 sq mi (10 km2) 0.08%
Population (2020)
• Total	47,026
• Estimate (2023)	47,498
• Density	9.8/sq mi (3.8/km2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional district	At-large
Website	www.ccgov.net

Campbell County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 47,026,^[1] making it the third-most populous county in Wyoming. Its county seat is Gillette.^[2] Campbell County comprises the Gillette, WY Micropolitan Statistical Area.

History

Campbell County was created in 1911 from land annexed from Crook and Weston Counties.^[3] It was named either for John Allen Campbell, a governor of the Wyoming Territory, or for Robert Campbell, a trapper and fur trader associated with William Henry Ashley.^[4]

Geography

According to the U.S. Census Bureau, the county has an area of 4,807 square miles (12,450 km²), of which 4,803 square miles (12,440 km²) is land and 4.0 square miles (10 km²) (9.6%) is water.^[5]

Adjacent counties

Powder River County, Montana – north
Crook County – northeast
Weston County – southeast
Converse County – south
Johnson County – southwest
Sheridan County – west

Major highways

Transit

Jefferson Lines

National protected area

Thunder Basin National Grassland (part)

Demographics

Historical population
Census	Pop.	Note	%±
1920	5,233		—
1930	6,720		28.4%
1940	6,048		−10.0%
1950	4,839		−20.0%
1960	5,861		21.1%
1970	12,957		121.1%
1980	24,367		88.1%
1990	29,370		20.5%
2000	33,698		14.7%
2010	46,133		36.9%
2020	47,026		1.9%
2023 (est.)	47,498	^[6]	1.0%
US Decennial Census^[7] 1870–2000^[8] 2010–2020^[1]

2000 census

As of the 2000 United States Census,^[9] there were 33,698 people, 12,207 households, and 9,008 families in the county. The population density was 7 people per square mile (2.7 people/km²). There were 13,288 housing units at an average density of 3 units per square mile (1.2 units/km²). The racial makeup of the county was 96.06% White, 0.15% Black or African American, 0.93% Native American, 0.32% Asian, 0.09% Pacific Islander, 1.12% from other races, and 1.34% from two or more races. 3.53% of the population were Hispanic or Latino of any race. 30.3% were of German, 11.4% English, 11.0% Irish, 8.5% American and 6.2% Norwegian ancestry.

There were 12,207 households, out of which 43.10% had children under the age of 18 living with them, 59.80% were married couples living together, 8.80% had a female householder with no husband present, and 26.20% were non-families. Of 12,207 households, 785 were unmarried partner households: 675 heterosexual, 52 same-sex male, and 58 same-sex female.

20.20% of all households were made up of individuals, and 3.90% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.16.

The county population contained 31.00% under the age of 18, 9.50% from 18 to 24, 32.30% from 25 to 44, 21.90% from 45 to 64, and 5.30% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 105.60 males. For every 100 females age 18 and over, there were 104.10 males.

The median income for a household in the county was $76,576, and the median income for a family was $53,927. Males had a median income of $41,814 versus $21,914 for females. The per capita income for the county was $20,063. About 5.60% of families and 7.60% of the population were below the poverty line, including 7.70% of those under age 18 and 12.40% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 46,133 people, 17,172 households, and 11,933 families in the county.^[10] The population density was 9.6 people per square mile (3.7 people/km²). There were 18,955 housing units at an average density of 3.9 units per square mile (1.5 units/km²).^[11] The racial makeup of the county was 93.2% white, 1.2% American Indian, 0.6% Asian, 0.3% black or African American, 2.7% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 7.8% of the population.^[10] In terms of ancestry, 32.2% were German, 15.9% were Irish, 10.8% were English, 5.5% were American, and 5.1% were Norwegian.^[12]

Of the 17,172 households, 39.0% had children under the age of 18 living with them, 54.0% were married couples living together, 8.6% had a female householder with no husband present, 30.5% were non-families, and 22.4% of all households were made up of individuals. The average household size was 2.66 and the average family size was 3.11. The median age was 31.9 years.^[10]

The median income for a household in the county was $76,576 and the median income for a family was $83,965. Males had a median income of $61,393 versus $31,769 for females. The per capita income for the county was $31,968. About 5.9% of families and 6.9% of the population were below the poverty line, including 10.5% of those under age 18 and 3.9% of those age 65 or over.^[13]

Communities

City

Gillette (county seat)

Town

Wright

Census-designated places

Sleepy Hollow

Unincorporated communities

Former census-designated place

Antelope Valley-Crestview^[a]

Politics

Campbell County is overwhelmingly Republican. No Democratic presidential candidate has carried Campbell County since Franklin D. Roosevelt won 46 of 48 contemporary states against Alf Landon in 1936. Since 1950, the only Democrat to have won forty percent of the county's vote is Lyndon Johnson in his 1964 landslide victory against Barry Goldwater, and in the subsequent half-century no Democrat has passed one-third of the county's vote. In the 21st century, no Democrat has won even 20% of the vote.

United States presidential election results for Campbell County, Wyoming^[14]
Year	Republican		Democratic		Third party(ies)
Year	No.	%	No.	%	No.	%
2024	16,006	87.26%	2,004	10.93%	332	1.81%
2020	16,975	86.76%	1,935	9.89%	656	3.35%
2016	15,778	86.70%	1,324	7.28%	1,097	6.03%
2012	14,953	85.10%	2,163	12.31%	455	2.59%
2008	13,011	79.72%	2,990	18.32%	319	1.95%
2004	12,415	82.22%	2,464	16.32%	220	1.46%
2000	10,203	81.36%	1,967	15.69%	370	2.95%
1996	6,382	53.68%	3,468	29.17%	2,039	17.15%
1992	5,315	47.42%	2,709	24.17%	3,184	28.41%
1988	6,702	73.55%	2,288	25.11%	122	1.34%
1984	8,387	83.91%	1,525	15.26%	83	0.83%
1980	5,613	73.19%	1,400	18.26%	656	8.55%
1976	3,306	66.19%	1,620	32.43%	69	1.38%
1972	2,953	78.64%	783	20.85%	19	0.51%
1968	1,694	66.67%	558	21.96%	289	11.37%
1964	1,606	57.32%	1,196	42.68%	0	0.00%
1960	1,575	64.66%	861	35.34%	0	0.00%
1956	1,473	69.19%	656	30.81%	0	0.00%
1952	1,823	73.10%	666	26.70%	5	0.20%
1948	1,201	57.99%	856	41.33%	14	0.68%
1944	1,514	62.87%	894	37.13%	0	0.00%
1940	1,540	57.57%	1,128	42.17%	7	0.26%
1936	1,322	47.49%	1,435	51.54%	27	0.97%
1932	1,161	38.96%	1,728	57.99%	91	3.05%
1928	1,528	66.52%	744	32.39%	25	1.09%
1924	1,121	52.36%	577	26.95%	443	20.69%
1920	1,027	66.69%	493	32.01%	20	1.30%
1916	448	38.62%	690	59.48%	22	1.90%
1912	186	25.14%	361	48.78%	193	26.08%