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Colorado's 4th congressional district is a congressional district in the U.S. state of Colorado. Located in the eastern part of the state, the district encompasses most of the rural Eastern Plains, as well as portions of the Colorado Front Range, including Loveland, Highlands Ranch, Castle Rock, and Parker.

The district is currently represented by Republican Lauren Boebert. With a Cook Partisan Voting Index rating of R+13, it is the most Republican district in Colorado. It is also the wealthiest congressional district in the state of Colorado.

History

1990s

Following the 1990 U.S. census and associated realignment of Colorado congressional districts, the 4th congressional district consisted of Baca, Bent, Cheyenne, Crowley, Elbert, Kiowa, Kit Carson, Larimer, Las Animas, Lincoln, Logan, Morgan, Otero, Phillips, Prowers, Sedgwick, Washington, Weld and Yuma counties, as well as portions of Adams and Arapahoe counties.

2000s

Following the 2000 U.S. census and associated realignment of Colorado congressional districts, the 4th congressional district consisted of Baca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson, Larimer, Lincoln, Logan, Morgan, Phillips, Prowers, Sedgwick, Washington, Weld and Yuma counties, as well as portions of Boulder, and Otero counties.

2010s

Following the 2010 U.S. census and associated realignment of Colorado congressional districts, the 4th congressional district consisted of Baca, Bent, Cheyenne, Crowley, Elbert, Kiowa, Kit Carson, Las Animas, Lincoln, Logan, Morgan, Otero, Phillips, Prowers, Sedgwick, Washington, Weld and Yuma counties. The district also includes portions of Adams, Arapahoe, Boulder and Douglas counties and very little portions of Larimer County.

Characteristics

This district consists mainly of the area of Colorado that is part of the Great Plains region of the United States. It is largely rural. The only large populated places in the district are Loveland, Highlands Ranch, Castle Rock, and Parker. Until the 2010s redistricting, Fort Collins was the largest city in the district and provided a large Democratic base, making the district somewhat competitive: before the 2020 redistricting, Greeley was the largest city in the district but has since been moved to the 8th district.

While the 4th takes in some suburbs of the Democratic-leaning Denver metropolitan area, the 4th takes in Douglas County, the most Republican region in the area. However, it is still far more friendly to the Democrats than the other counties in the district (especially in blue-leaning Highlands Ranch and Lone Tree) and is the only area in the district with any Democratic support of real significance. On the other hand, the district takes in some of the most Republican counties in Colorado, such as Washington, Kit Carson, and Logan, where Democrats rarely exceed even 20 percent of the vote.

Historically, the district has been Republican-leaning, though Marilyn Musgrave won relatively narrow victories in 2004 and 2006 due to her Democratic opponents' strength in Fort Collins. Musgrave had to rely on strong performances in more conservative Greeley to hold onto her seat. In 2008, Musgrave lost reelection to Betsy Markey, who became the first Democrat to represent the district since the early 1970s. Markey was defeated in 2010 by Republican Cory Gardner, and the district was made more Republican in redistricting due to the removal of Fort Collins.

George W. Bush received 58% of the vote in this district in 2004. John McCain narrowly carried the district in 2008 with 50% of the vote.

The current incumbent, Republican Lauren Boebert, was elected to the seat on November 5, 2024, having previously represented Colorado's 3rd Congressional District. Boebert defeated Democratic nominee and former AFL-CIO speechwriter Trisha Calvarese.

Composition

Cities of 10,000 people or more

• Highlands Ranch – 105,631
• Loveland – 76,378
• Castle Rock – 73,158
• Parker – 58,512
• Windsor – 35,788
• Lone Tree – 14,253
• Sterling – 13,735
• The Pinery – 11,311
• Castle Pines – 11,036

2,500 – 10,000 people

• Roxborough Park – 9,416
• Stonegate – 9,072
• Lamar – 7,687
• Severance – 7,683
• Eaton – 5,802
• Brush – 5,339
• Meridian – 4,786
• Castle Pines Village – 4,327
• Sierra Ridge – 3,490
• Yuma – 3,456
• Ponderosa Park – 3,334
• Strasburg – 3,307
• Meridian Village – 3,202
• Burlington – 3,172
• Acres Green – 2,922
• Bennett – 2,862
• Stepping Stone – 2,780

Recent election results from statewide races

List of members representing the district

Member	Party	Term duration	Cong ress(es)	Electoral history	District location
District created March 4, 1915
Edward T. Taylor (Glenwood Springs)	Democratic	March 4, 1915 – September 3, 1941	64th 65th 66th 67th 68th 69th 70th 71st 72nd 73rd 74th 75th 76th 77th	Redistricted from the at-large district and re-elected in 1914. Re-elected in 1916. Re-elected in 1918. Re-elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Re-elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Died.
Vacant		September 3, 1941 – December 9, 1941	77th
Robert F. Rockwell (Paonia)	Republican	December 9, 1941 – January 3, 1949	77th 78th 79th 80th	Elected to finish Taylor's term. Re-elected in 1942. Re-elected in 1944. Re-elected in 1946. Lost re-election.
Wayne N. Aspinall (Palisade)	Democratic	January 3, 1949 – January 3, 1973	81st 82nd 83rd 84th 85th 86th 87th 88th 89th 90th 91st 92nd	Elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Re-elected in 1958. Re-elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Lost renomination.
James Paul Johnson (Fort Collins)	Republican	January 3, 1973 – January 3, 1981	93rd 94th 95th 96th	Elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Retired.
Hank Brown (Greeley)	Republican	January 3, 1981 – January 3, 1991	97th 98th 99th 100th 101st	Elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Retired to run for U.S. Senator.
Wayne Allard (Loveland)	Republican	January 3, 1991 – January 3, 1997	102nd 103rd 104th	Elected in 1990. Re-elected in 1992. Re-elected in 1994. Retired to run for U.S. Senator.
Bob Schaffer (Fort Collins)	Republican	January 3, 1997 – January 3, 2003	105th 106th 107th	Elected in 1996. Re-elected in 1998. Re-elected in 2000. Retired.
Marilyn Musgrave (Fort Morgan)	Republican	January 3, 2003 – January 3, 2009	108th 109th 110th	Elected in 2002. Re-elected in 2004. Re-elected in 2006. Lost re-election.	2003–2013
Betsy Markey (Fort Collins)	Democratic	January 3, 2009 – January 3, 2011	111th	Elected in 2008. Lost re-election.
Cory Gardner (Yuma)	Republican	January 3, 2011 – January 3, 2015	112th 113th	Elected in 2010. Re-elected in 2012. Retired to run for U.S. Senator.
					2013–2023
Ken Buck (Windsor)	Republican	January 3, 2015 – March 22, 2024	114th 115th 116th 117th 118th	Elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Resigned.
					2023–present
Vacant		March 22, 2024 – July 8, 2024	118th
Greg Lopez (Elizabeth)	Republican	July 8, 2024 – January 3, 2025		Elected to finish Buck's term. Retired.
Lauren Boebert (Windsor)	Republican	January 3, 2025 – present	119th	Moved from the 3rd district and re-elected in 2024.

Election results

1914

1916

1918

1920

1922

1924

1926

1928

1930

1932

1934

1936

1938

1940

1941 (special)

1942

1944

1946

1948

1950

1952

1954

1956

1958

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

2012

2014

2016

2018

2020

2022

2024 (special)

Historical district boundaries

See also

• Colorado's congressional districts
• List of United States congressional districts

References

• Martis, Kenneth C. (1989). The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982). The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–present Archived April 23, 2010, at the Wayback Machine

1. "Congressional Districts Relationship Files (state-based)". www.census.gov. US Census Bureau Geography.
2. "My Congressional District". www.census.gov. Center for New Media & Promotion (CNMP), US Census Bureau.
3. "My Congressional District".
4. ^ "2022 Cook PVI: District Map and List". Cook Political Report. July 12, 2022. Retrieved January 10, 2023.
5. Andrew DePietro (October 1, 2024). "The Richest Congressional Districts In Every State Of 2024". Forbes.
6. "4th Congressional District: Democrat Trisha Calvarese". June 3, 2024.
7. "Trisha Calvarese".
8. https://davesredistricting.org/maps#viewmap::39f44408-23f7-439d-b7eb-923da58b63df
9. 2022 CO Statewide races by CD. docs.google.com (Report).
10. "State of Colorado Elections Database » 2022 Nov 8 :: General Election :: Attorney General :: State of Colorado". State of Colorado Elections Database. Archived from the original on July 10, 2024. Retrieved August 21, 2024.
11. "Our Campaigns - CO District 4 Race - Nov 03, 1914". www.ourcampaigns.com.
12. "Our Campaigns - CO District 4 Race - Nov 07, 1916". www.ourcampaigns.com.
13. "Our Campaigns - CO District 4 Race - Nov 05, 1918". www.ourcampaigns.com.
14. "1920 Election Results" (PDF). house.gov.
15. "1922 Election Results" (PDF). house.gov.
16. "1924 Election Results" (PDF). house.gov.
17. "1926 Election Results" (PDF). house.gov.
18. "1928 Election Results" (PDF). house.gov.
19. "1930 Election Results" (PDF). house.gov.
20. "1932 Election Results" (PDF). house.gov.
21. "1934 Election Results" (PDF). house.gov.
22. "1936 Election Results" (PDF). house.gov.
23. "1938 Election Results" (PDF). house.gov.
24. "1940 Election Results" (PDF). house.gov.
25. "Our Campaigns - CO District 4 - Special Election Race - Dec 09, 1941". www.ourcampaigns.com.
26. "1942 Election Results" (PDF). house.gov.
27. "1944 Election Results" (PDF). house.gov.
28. "1946 Election Results" (PDF). house.gov.
29. "1948 Election Results" (PDF). house.gov.
30. "1950 Election Results" (PDF). house.gov.
31. "1952 Election Results" (PDF). house.gov.
32. "1954 Election Results" (PDF). house.gov.
33. "1956 Election Results" (PDF). house.gov.
34. "1958 Election Results" (PDF). house.gov.
35. "1960 Election Results" (PDF). house.gov.
36. "1962 Election Results" (PDF). house.gov.
37. "1964 Election Results" (PDF). house.gov.
38. "1966 Election Results" (PDF). house.gov.
39. "1968 Election Results" (PDF). house.gov.
40. "1970 Election Results" (PDF). house.gov.
41. "1972 Election Results" (PDF). house.gov.
42. "1974 Election Results" (PDF). house.gov.
43. "1976 Election Results" (PDF). house.gov.
44. "1978 Election Results" (PDF). house.gov.
45. "1980 Election Results" (PDF). house.gov.
46. "1982 Election Results" (PDF). house.gov.
47. "1984 Election Results" (PDF). house.gov.
48. "1986 Election Results" (PDF). house.gov.
49. "1988 Election Results" (PDF). house.gov.
50. "1990 Election Results" (PDF). house.gov.
51. "1992 Election Results" (PDF). house.gov.
52. "1994 Election Results" (PDF). house.gov.
53. "1996 Election Results" (PDF). house.gov.
54. "1998 Election Results" (PDF). house.gov.
55. "2000 Election Results" (PDF). house.gov.
56. "2002 Election Results" (PDF). house.gov.
57. "2004 Election Results" (PDF). house.gov.
58. "2006 Election Results" (PDF). house.gov.
59. "2008 Election Results" (PDF). house.gov.
60. ^ "2010 Election Results". state.co.us. Archived from the original on November 29, 2010. Retrieved July 24, 2011.
61. "2018 Colorado general election results". Retrieved June 21, 2019.
62. "2020 General Election - Official Compiled Results". Colorado Secretary of State. Retrieved December 6, 2020.
63. "Certificate & Results - General Election Statewide Abstract of Votes Cast" (PDF). Colorado Secretary of State.
64. "Representative to the 118th United States Congress - District 4 (Congressional Vacancy Election)". Colorado Secretary of State. 2024. Retrieved July 7, 2024.

External links

• Interactive map of Colorado's 4th Congressional District

39°04′15″N 103°24′50″W / 39.07083°N 103.41389°W / 39.07083; -103.41389

• Congressional districts of Colorado
• Eastern Plains
• 1915 establishments in Colorado