# Colorado's 4th congressional district

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

For the 118th and successive Congresses (based on redistricting following the 2020 census), the district contains all or portions of the following counties and communities:
Adams County (3)
    Bennett, Strasburg (shared with Arapahoe County), Watkins (shared with Arapahoe County)
Arapahoe County (7)
    Brick Center, Byers, Comanche Creek, Deer Trail, Peoria, Strasburg (shared with Adams County), Watkins (shared with Adams County)
Baca County (6)
    All 6 communities
Bent County (3)
    All 3 communities
Cheyenne County (3)
    All 3 communities
Crowley County (4)
    All 4 communities
Douglas County (22)
    Acres Green, Castle Pines, Castle Pines Village, Castle Rock, Franktown, Grand View Estates, Highlands Ranch, Larkspur, Lone Tree, Louviers, Meridian, Meridian Village, Parker, Perry Park, Roxborough Park, Sedalia, Sierra Ridge, Stepping Stone, Sterling Ranch, Stonegate, The Pinery, Westcreek
Elbert County (6)
    All 6 communities
El Paso County (2)
    Calhan, Ramah
Kiowa County (5)
    All 5 communities
Kit Carson County (6)
    All 6 communities
Larimer County (3)
    Loveland, Wellington, Windsor (shared with Weld County)
Lincoln County (4)
    All 4 communities
Lincoln County (4)
    All 4 communities
Logan County (8)
    All 8 communities
Morgan County (13)
    All 13 communities
Phillips County (4)
    All 4 communities
Prowers County (5)
    All 5 communities
Sedgwick County (3)
    All 3 communities
Washington County (3)
    All 3 communities
Weld County (11)
    Ault, Briggsdale, Eaton, Grover, Hudson, Keenesburg, Nunn, Pierce, Raymer, Severance, Windsor (shared Larimer County)

## Recent election results from statewide races

| Year | Office | Results |
| 2008 | President | McCain 59% - 39% |
| 2008 | Senate | Schaffer 57% - 38% |
| 2010 | Senate | Buck 60% - 34% |
| 2010 | Attorney General | Suthers 71% - 29% |
| 2010 | Secretary of State | Gessler 64% - 28% |
| 2010 | Treasurer | Stapleton 65% - 35% |
| 2012 | President | Romney 64% - 36% |
| 2014 | Senate | Gardner 59% - 36% |
| 2016 | President | Trump 60% - 32% |
| 2016 | Senate | Glenn 60% - 35% |
| 2018 | Governor | Stapleton 60% - 36% |
| 2018 | Attorney General | Brauchler 63% - 34% |
| 2020 | President | Trump 58% - 39% |
| 2020 | Senate | Gardner 61% - 37% |
| 2022 | Senate | O'Dea 57% - 40% |
| 2022 | Governor | Ganahl 55% - 42% |
| 2022 | Attorney General | Kellner 60% - 38% |
| 2022 | Secretary of State | Anderson 58% - 39% |
| 2022 | Treasurer | Sias 59% - 38% |
| 2024 | President | Trump 58% - 40% |

## 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 | 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. | 2003–2013 |
| 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. | 2003–2013 |
| 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. | 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 | Vacant | March 22, 2024 – July 8, 2024 | 118th | | 2023–present |
| Greg Lopez (Elizabeth) | Republican | July 8, 2024 – January 3, 2025 | 118th | Elected to finish Buck's term. Retired. | 2023–present |
| Lauren Boebert (Windsor) | Republican | January 3, 2025 – present | 119th | Moved from the 3rd district and re-elected in 2024. | 2023–present |

## Election results
### 1914

1914 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (Incumbent) | 26,562 | 57.83 |
| | Republican | H. J. Baird | 15,015 | 32.69 |
| | Socialist | George Kunkle | 4,353 | 9.48 |
| Total votes | Total votes | Total votes | 45,930 | 100.0 |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |

### 1916

1916 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 30,926 | 65.78 |
| | Republican | H. J. Baird | 13,397 | 28.49 |
| | Socialist | Emery D. Cox | 2,695 | 5.73 |
| Total votes | Total votes | Total votes | 47,018 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1918

1918 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 22,423 | 65.72 |
| | Republican | Straud M. Logan | 11,695 | 34.28 |
| Total votes | Total votes | Total votes | 34,118 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1920

1920 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 25,994 | 55.32 |
| | Republican | Merle D. Vincent | 20,991 | 44.68 |
| Total votes | Total votes | Total votes | 46,985 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1922

1922 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 30,331 | 64.26 |
| | Republican | Merle D. Vincent | 16,870 | 35.74 |
| Total votes | Total votes | Total votes | 47,201 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1924

1924 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 33,262 | 65.54 |
| | Republican | Webster S. Whinnery | 17,486 | 34.46 |
| Total votes | Total votes | Total votes | 50,748 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1926

1926 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 32,093 | 66.75 |
| | Republican | Webster S. Whinnery | 15,990 | 33.25 |
| Total votes | Total votes | Total votes | 48,083 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1928

1928 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 30,142 | 58.84 |
| | Republican | William P. Dale | 21,089 | 41.16 |
| Total votes | Total votes | Total votes | 51,231 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1930

1930 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 34,536 | 66.95 |
| | Republican | Webster S. Whinnery | 17,051 | 33.05 |
| Total votes | Total votes | Total votes | 51,587 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1932

1932 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 40,736 | 65.99 |
| | Republican | Richard C. Callen | 20,993 | 34.01 |
| Total votes | Total votes | Total votes | 61,729 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1934

1934 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 39,747 | 67.30 |
| | Republican | Harry McDevitt | 17,234 | 29.18 |
| | Veterans' Party | Gustavis A. Billstrom | 1,625 | 2.75 |
| | Independent | O. W. Daggett | 457 | 0.77 |
| Total votes | Total votes | Total votes | 59,063 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1936

1936 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 42,010 | 65.45 |
| | Republican | John S. Woody | 22,175 | 34.55 |
| Total votes | Total votes | Total votes | 64,185 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1938

1938 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 43,596 | 63.74 |
| | Republican | John S. Woody | 24,805 | 36.26 |
| Total votes | Total votes | Total votes | 68,401 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1940

1940 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Edward T. Taylor (incumbent) | 44,095 | 59.41 |
| | Republican | Paul W. Crawford | 30,126 | 40.59 |
| Total votes | Total votes | Total votes | 74,221 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1941 (special)

1941 Colorado's 4th congressional district special election :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert F. Rockwell | 19,918 | 54.04 |
| | Democratic | Frank Delaney | 16,941 | 45.96 |
| Total votes | Total votes | Total votes | 36,859 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1942

1942 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert F. Rockwell (incumbent) | 28,460 | 58.75 |
| | Democratic | Elizabeth E. Pellet | 19,979 | 41.25 |
| Total votes | Total votes | Total votes | 48,439 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1944

1944 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert F. Rockwell (incumbent) | 38,671 | 61.67 |
| | Democratic | John L. Heuschkel | 24,039 | 38.33 |
| Total votes | Total votes | Total votes | 62,710 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1946

1946 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert F. Rockwell (incumbent) | 28,894 | 58.75 |
| | Democratic | Thomas Matthews | 20,290 | 41.25 |
| Total votes | Total votes | Total votes | 49,184 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1948

1948 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall | 34,695 | 51.86 |
| | Republican | Robert F. Rockwell (incumbent) | 32,206 | 48.14 |
| Total votes | Total votes | Total votes | 66,901 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1950

1950 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 35,797 | 57.30 |
| | Republican | Jack Evans | 26,674 | 42.70 |
| Total votes | Total votes | Total votes | 62,471 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1952

1952 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 39,676 | 50.02 |
| | Republican | Howard M. Shults | 39,647 | 49.98 |
| Total votes | Total votes | Total votes | 79,323 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1954

1954 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 34,294 | 53.49 |
| | Republican | Charles E. Wilson | 29,818 | 46.51 |
| Total votes | Total votes | Total votes | 64,112 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1956

1956 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 48,489 | 61.76 |
| | Republican | Hugh Caldwell | 30,026 | 38.24 |
| Total votes | Total votes | Total votes | 78,515 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1958

1958 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 43,785 | 63.61 |
| | Republican | J. R. "Dick" Wells | 25,048 | 36.39 |
| Total votes | Total votes | Total votes | 68,833 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1960

1960 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 58,731 | 68.54 |
| | Republican | Charles P. Casteel | 26,960 | 31.46 |
| Total votes | Total votes | Total votes | 85,691 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1962

1962 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 42,462 | 58.65 |
| | Republican | Leo L. Sommerville | 29,943 | 41.35 |
| Total votes | Total votes | Total votes | 72,405 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1964

1964 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 106,685 | 63.02 |
| | Republican | Edwin S. Lamm | 62,617 | 36.98 |
| Total votes | Total votes | Total votes | 169,302 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1966

1966 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 84,107 | 58.61 |
| | Republican | James Paul Johnson | 59,404 | 41.39 |
| Total votes | Total votes | Total votes | 143,511 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1968

1968 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 92,680 | 54.69 |
| | Republican | Fred E. Anderson | 76,776 | 45.31 |
| Total votes | Total votes | Total votes | 169,456 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1970

1970 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Wayne Aspinall (incumbent) | 76,244 | 55.08 |
| | Republican | Bill Gossard | 62,169 | 44.92 |
| Total votes | Total votes | Total votes | 138,413 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1972

1972 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | James Paul Johnson | 94,994 | 51.03 |
| | Democratic | Alan Merson | 91,151 | 48.97 |
| Total votes | Total votes | Total votes | 186,145 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1974

1974 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | James Paul Johnson (incumbent) | 82,982 | 52.05 |
| | Democratic | John Carroll | 76,452 | 47.95 |
| Total votes | Total votes | Total votes | 159,434 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1976

1976 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | James Paul Johnson (incumbent) | 119,458 | 54.05 |
| | Democratic | Daniel Ogden | 76,995 | 34.84 |
| | Independent | Dick Davis | 20,398 | 9.23 |
| | Independent | Henry Thiel | 4,167 | 1.89 |
| Total votes | Total votes | Total votes | 221,018 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1978

1978 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | James Paul Johnson (incumbent) | 103,121 | 61.18 |
| | Democratic | Morgan Smith | 65,421 | 38.82 |
| Total votes | Total votes | Total votes | 168,542 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1980

1980 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Hank Brown | 178,221 | 68.42 |
| | Democratic | Polly Baca | 76,849 | 29.50 |
| | Libertarian | Cynthia Molson-Smith | 5,421 | 2.08 |
| Total votes | Total votes | Total votes | 260,491 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1982

1982 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Hank Brown (incumbent) | 105,550 | 69.76 |
| | Democratic | Charles "Bud" Bishopp | 45,750 | 30.24 |
| Total votes | Total votes | Total votes | 151,300 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1984

1984 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Hank Brown (incumbent) | 146,469 | 71.13 |
| | Democratic | Mary Fagan Bates | 56,462 | 27.42 |
| | Libertarian | Randy Fitzgerald | 2,999 | 1.45 |
| Total votes | Total votes | Total votes | 205,930 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1986

1986 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Hank Brown (incumbent) | 117,089 | 69.80 |
| | Democratic | David Sprague | 50,672 | 30.20 |
| Total votes | Total votes | Total votes | 167,761 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1988

1988 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Hank Brown (incumbent) | 156,202 | 73.08 |
| | Democratic | Charles S. Vigil | 57,552 | 26.92 |
| Total votes | Total votes | Total votes | 213,754 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1990

1990 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Wayne Allard | 89,285 | 54.05 |
| | Democratic | Richard R. "Dick" Bond | 75,901 | 45.95 |
| Total votes | Total votes | Total votes | 165,186 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1992

1992 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Wayne Allard (incumbent) | 139,884 | 57.84 |
| | Democratic | Tom Redder | 101,957 | 42.16 |
| Total votes | Total votes | Total votes | 241,841 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1994

1994 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Wayne Allard (incumbent) | 136,251 | 72.30 |
| | Democratic | Cathy Kipp | 52,202 | 27.70 |
| Total votes | Total votes | Total votes | 188,453 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1996

1996 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Bob Schaffer | 137,012 | 56.14 |
| | Democratic | Guy Kelley | 92,837 | 38.04 |
| | American | Wesley Paul "Wes" McKinley | 7,428 | 3.04 |
| | Natural Law | Cynthia Parker | 6,790 | 2.78 |
| Total votes | Total votes | Total votes | 244,067 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1998

1998 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Bob Schaffer (incumbent) | 131,318 | 59.34 |
| | Democratic | Susan Kirkpatrick | 89,973 | 40.66 |
| Total votes | Total votes | Total votes | 221,291 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2000

2000 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Bob Schaffer (incumbent) | 209,078 | 79.50 |
| | Natural Law | Dan Sewell Ward | 19,721 | 7.50 |
| | Libertarian | Kordon L. Baker | 19,713 | 7.50 |
| | Constitution | Leslie J. Hanks | 9,955 | 3.77 |
| | Write-in | | 4,539 | 1.73 |
| Total votes | Total votes | Total votes | 263,006 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2002

2002 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Marilyn Musgrave | 115,359 | 54.95 |
| | Democratic | Stan Matsunaka | 87,499 | 41.68 |
| | Libertarian | John Volz | 7,097 | 3.37 |
| Total votes | Total votes | Total votes | 209,955 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2004

2004 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Marilyn Musgrave (incumbent) | 155,958 | 51.05 |
| | Democratic | Stan Matsunaka | 136,812 | 44.78 |
| | Green | Bob Kinsey | 12,739 | 4.17 |
| Total votes | Total votes | Total votes | 305,509 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2006

2006 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Marilyn Musgrave (incumbent) | 109,732 | 45.61 |
| | Democratic | Angie Paccione | 103,748 | 43.11 |
| | Reform | Eric Eidsness | 27,133 | 11.28 |
| Total votes | Total votes | Total votes | 240,613 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2008

2008 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Democratic | Betsy Markey | 187,348 | 56% |
| | Republican | Marilyn Musgrave (incumbent) | 146,030 | 44% |
| Total votes | Total votes | Total votes | 333,378 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2010

2010 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Cory Gardner | 138,634 | 52% |
| | Democratic | Betsy Markey (incumbent) | 109,249 | 41% |
| | Constitution | Doug Aden | 12,312 | 5% |
| | No party | Ken "Wasko" Waszkiewicz | 3,986 | 2% |
| Total votes | Total votes | Total votes | 264,181 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 2012

2012 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Cory Gardner (incumbent) | 200,006 | 59% |
| | Democratic | Brandon Shaffer | 128,800 | 37% |
| | Libertarian | Josh Gilliland | 10,682 | 3% |
| | Constitution | Doug Aden | 5,848 | 1% |
| Total votes | Total votes | Total votes | 345,336 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2014

2014 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Buck | 185,292 | 65% |
| | Democratic | Vic Meyers | 83,727 | 29% |
| | Libertarian | Jess Loban | 9,472 | 3% |
| | Independent | Grant Doherty | 8,016 | 3% |
| Total votes | Total votes | Total votes | 286,507 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2016

2016 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Buck (incumbent) | 248,230 | 63.5% |
| | Democratic | Bob Seay | 123,642 | 31.7% |
| | Libertarian | Bruce Griffith | 18,761 | 4.8% |
| Total votes | Total votes | Total votes | 390,633 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2018

2018 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Buck (incumbent) | 224,038 | 60.61% |
| | Democratic | Karen McCormick | 145,544 | 39.38% |
| | Write-in | Write-in | 38 | 0.01% |
| Total votes | Total votes | Total votes | 369,620 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2020

2020 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Buck (incumbent) | 285,606 | 60.1% |
| | Democratic | Ike McCorkle | 173,945 | 36.6% |
| | Libertarian | Bruce Griffith | 11,026 | 2.3% |
| | Unity | Laura Ireland | 4,530 | 1.0% |
| Total votes | Total votes | Total votes | 475,107 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2022

2022 United States House of Representatives elections :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Buck (incumbent) | 216,024 | 60.9% |
| | Democratic | Ike McCorkle | 129,619 | 36.6% |
| | American Constitution | Ryan McGonigal | 8,870 | 2.5% |
| Total votes | Total votes | Total votes | 354,513 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2024 (special)

2024 Colorado's 4th congressional district special election :
| Party | Party | Candidate | Votes | % |
| | Republican | Greg Lopez | 100,068 | 58.40% |
| | Democratic | Trisha Calvarese | 59,003 | 34.43% |
| | Libertarian | Hannah Goodman | 9,065 | 5.29% |
| | Approval Voting | Frank Atwood | 3,224 | 1.88% |
| Total votes | Total votes | Total votes | 171,360 | 100.00% |
| | Republican hold | Republican hold | Republican hold | Republican hold |