# Colorado's 1st congressional district

Colorado's 1st congressional district is a congressional district in the U.S. state of Colorado, based primarily in the City and County of Denver in the central part of the state. The district includes almost all of the City and County of Denver, and the Denver enclaves of Glendale and Holly Hills. A small portion of the City and County of Denver near Four Square Mile is located in Colorado's 6th congressional district.
The district has been represented by Democrat Diana DeGette since 1997. An urban and diverse district based in the heart of Metropolitan Denver, and with a Cook Partisan Voting Index rating of D+29, it is the most Democratic district in both Colorado and the Mountain West. Only two Republicans have been elected to the seat since the Great Depression: Dean M. Gillespie was the district's representative from 1944 to 1947; and Mike McKevitt from 1971 to 1973, winning thanks to an ideological split among Denver Democrats. No Republican has even notched 30% of the vote in the district after 1998.

## History
### 1990s

Following the 1990 United States census and consequential redrawing of Colorado's congressional districts, the 1st congressional district consisted of all of the City and County of Denver and parts of Adams, Arapahoe, and Jefferson counties.

### 2000s

Following the 2000 United States census and consequential redistricting of Colorado's congressional districts, the 1st congressional district consisted of all of the City and County of Denver and parts of Arapahoe County, including parts or all of the cities of Englewood, Cherry Hills Village, Sheridan, Aurora, and Glendale.

### 2010s

Following the 2010 United States census and consequential redistricting of Colorado's congressional districts, the 1st congressional district consisted of all of the City and County of Denver and parts of Arapahoe County including parts or all of the cities of Englewood, Cherry Hills Village, Sheridan, Aurora, and Glendale. The 1st district also took in additional area in the southwestern suburbs which included parts of Jefferson County and the CDPs of Columbine and Ken Caryl.

### 2020s

Following the 2020 United States census and consequential redistricting of Colorado's congressional districts, the 1st congressional district consisted of all of the City and County of Denver and parts of Arapahoe County that are enclaves within the Denver city borders such as Glendale and Holly Hills: the Jefferson County portions were moved to the 7th District, while the southern Arapahoe County suburbs were moved to the Aurora-based 6th District.

## 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: Arapahoe County (2)
    Glendale, Holly Hills
Denver County (1)
    Denver (part; also 6th)

## Recent election results from statewide races

| Year | Office | Results |
| 2008 | President | Obama 75% - 23% |
| 2008 | Senate | Udall 73% - 23% |
| 2010 | Senate | Bennet 71% - 24% |
| 2010 | Governor | Hickenlooper 74% - 4% |
| 2010 | Attorney General | Garnett 67% - 33% |
| 2010 | Secretary of State | Buescher 68% - 27% |
| 2010 | Treasurer | Kennedy 73% - 27% |
| 2012 | President | Obama 75% - 25% |
| 2014 | Senate | Udall 70% - 25% |
| 2016 | President | Clinton 74% - 19% |
| 2016 | Senate | Bennet 73% - 22% |
| 2018 | Governor | Polis 77% - 20% |
| 2018 | Attorney General | Weiser 76% - 21% |
| 2020 | President | Biden 80% - 18% |
| 2020 | Senate | Hickenlooper 78% - 20% |
| 2022 | Senate | Bennet 80% - 18% |
| 2022 | Governor | Polis 82% - 16% |
| 2022 | Attorney General | Weiser 79% - 19% |
| 2022 | Secretary of State | Griswold 78% - 19% |
| 2022 | Treasurer | Young 77% - 20% |
| 2024 | President | Harris 77% - 21% |

## List of members representing the district

| Member | Party | Years | Cong ress(es) | Electoral history | District location |
| District created March 4, 1893 ||||||
| Lafayette Pence (Denver) | Populist | March 4, 1893 – March 3, 1895 | 53rd | Elected in 1892. Lost re-election. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| John F. Shafroth (Denver) | Republican | March 4, 1895 – March 3, 1897 | 54th 55th 56th 57th 58th | Elected in 1894. Changed parties and re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Changed parties and re-elected in 1902. Resigned amid election contest. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| John F. Shafroth (Denver) | Silver Republican | March 4, 1897 – March 3, 1903 | 54th 55th 56th 57th 58th | Elected in 1894. Changed parties and re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Changed parties and re-elected in 1902. Resigned amid election contest. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| John F. Shafroth (Denver) | Democratic | March 4, 1903 – February 15, 1904 | 54th 55th 56th 57th 58th | Elected in 1894. Changed parties and re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Changed parties and re-elected in 1902. Resigned amid election contest. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| Robert W. Bonynge (Denver) | Republican | February 16, 1904 – March 3, 1909 | 58th 59th 60th | Won election contest. Re-elected in 1904. Re-elected in 1906. Lost re-election. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| Atterson W. Rucker (Fort Logan) | Democratic | March 4, 1909 – March 3, 1913 | 61st 62nd | Elected in 1908. Re-elected in 1910. Lost renomination. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| George Kindel (Denver) | Democratic | March 4, 1913 – March 3, 1915 | 63rd | Elected in 1912. Retired to run for U.S. senator. | 1893–1915 Adams, Arapahoe, Boulder, Denver, Jackson, Jefferson, Lake, Larimer, Logan, Morgan, Park, Phillips, Sedgwick, Washington, Weld, and Yuma |
| Benjamin Hilliard (Denver) | Democratic | March 4, 1915 – March 3, 1919 | 64th 65th | Elected in 1914. Re-elected in 1916. Lost re-election. | 1915–1923 [data missing] |
| William Vaile (Denver) | Republican | March 4, 1919 – July 2, 1927 | 66th 67th 68th 69th 70th | Elected in 1918. Re-elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Died. | 1915–1923 [data missing] |
| William Vaile (Denver) | Republican | March 4, 1919 – July 2, 1927 | 66th 67th 68th 69th 70th | Elected in 1918. Re-elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Died. | 1923–1965 [data missing] |
| Vacant | Vacant | July 2, 1927 – November 15, 1927 | 70th | | 1923–1965 [data missing] |
| S. Harrison White (Denver) | Democratic | November 15, 1927 – March 3, 1929 | 70th | Elected to finish Vaile's term. Lost re-election. | 1923–1965 [data missing] |
| William R. Eaton (Denver) | Republican | March 4, 1929 – March 3, 1933 | 71st 72nd | Elected in 1928. Re-elected in 1930. Lost re-election. | 1923–1965 [data missing] |
| Lawrence Lewis (Denver) | Democratic | March 4, 1933 – December 9, 1943 | 73rd 74th 75th 76th 77th 78th | Elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Died. | 1923–1965 [data missing] |
| Vacant | Vacant | December 9, 1943 – March 7, 1944 | 78th | | 1923–1965 [data missing] |
| Dean M. Gillespie (Denver) | Republican | March 7, 1944 – January 3, 1947 | 78th 79th | Elected to finish Lewis's term. Re-elected later in 1944. Lost re-election. | 1923–1965 [data missing] |
| John A. Carroll (Denver) | Democratic | January 3, 1947 – January 3, 1951 | 80th 81st | Elected in 1946. Re-elected in 1948. Retired to run for U.S. senator. | 1923–1965 [data missing] |
| Byron Rogers (Denver) | Democratic | January 3, 1951 – January 3, 1971 | 82nd 83rd 84th 85th 86th 87th 88th 89th 90th 91st | 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. Lost renomination. | 1923–1965 [data missing] |
| Byron Rogers (Denver) | Democratic | January 3, 1951 – January 3, 1971 | 82nd 83rd 84th 85th 86th 87th 88th 89th 90th 91st | 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. Lost renomination. | 1965–1973 [data missing] |
| Mike McKevitt (Denver) | Republican | January 3, 1971 – January 3, 1973 | 92nd | Elected in 1970. Lost re-election. | 1965–1973 [data missing] |
| Pat Schroeder (Denver) | Democratic | January 3, 1973 – January 3, 1997 | 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd 104th | Elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Re-elected in 1992. Re-elected in 1994. Retired. | 1973–1983 Parts of Arapahoe and Denver |
| Pat Schroeder (Denver) | Democratic | January 3, 1973 – January 3, 1997 | 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd 104th | Elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Re-elected in 1992. Re-elected in 1994. Retired. | 1983–1993 Parts of Arapahoe and Denver |
| Pat Schroeder (Denver) | Democratic | January 3, 1973 – January 3, 1997 | 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd 103rd 104th | Elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Re-elected in 1992. Re-elected in 1994. Retired. | 1993–2003 Denver; parts of Adams and Arapahoe |
| Diana DeGette (Denver) | Democratic | January 3, 1997 – present | 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th 118th 119th | Elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 1993–2003 Denver; parts of Adams and Arapahoe |
| Diana DeGette (Denver) | Democratic | January 3, 1997 – present | 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th 118th 119th | Elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 2003–2013 Denver; parts of Arapahoe |
| Diana DeGette (Denver) | Democratic | January 3, 1997 – present | 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th 118th 119th | Elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 2013–2023 Denver; parts of Arapahoe and Jefferson |
| Diana DeGette (Denver) | Democratic | January 3, 1997 – present | 105th 106th 107th 108th 109th 110th 111th 112th 113th 114th 115th 116th 117th 118th 119th | Elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 2023–present Denver; parts of Arapahoe (enclaves only) |

## Election results
### 1892

1892 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Populist | Lafayette Pence | 20,004 | 49.11% |
| | Republican | Earl B. Coe | 17,609 | 43.23% |
| | Democratic | John G. Taylor | 2,240 | 5.50% |
| | Prohibition | W.G. Sprague | 876 | 2.15% |
| Majority | Majority | Majority | 2,395 | 5.88% |
| Total votes | Total votes | Total votes | 40,729 | 100% |
| | Populist gain from new seat | Populist gain from new seat | Populist gain from new seat | Populist gain from new seat |

### 1894

1894 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | John F. Shafroth | 47,710 | 55.32% |
| | Populist | Lafayette Pence (incumbent) | 34,223 | 39.68% |
| | Prohibition | Robert H. Rhodes | 2,465 | 2.86% |
| | Democratic | John T. Bottom | 1,847 | 2.14% |
| Majority | Majority | Majority | 13,487 | 15.64% |
| Total votes | Total votes | Total votes | 86,245 | 100% |
| | Republican gain from Populist | Republican gain from Populist | Republican gain from Populist | Republican gain from Populist |

### 1896

1896 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Silver Republican | John F. Shafroth (incumbent) | 67,821 | 84.89% |
| | Republican | T.E. McClelland | 9,625 | 12.05% |
| | Natural Prohibition | J.J. Losh | 1,083 | 1.36% |
| | Prohibition | W.T. Steele | 1,006 | 1.26% |
| | National | Dayton O. Gilbert | 181 | 0.23% |
| | Socialist Labor | William Dye | 173 | 0.22% |
| Majority | Majority | Majority | 58,196 | 72.84% |
| Total votes | Total votes | Total votes | 79,889 | 100% |
| | Silver Republican hold | Silver Republican hold | Silver Republican hold | Silver Republican hold |

### 1898

1898 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Silver Republican | John F. Shafroth (incumbent) | 43,111 | 67.61% |
| | Republican | Charles Hartsell | 18,580 | 29.14% |
| | Prohibition | Dayton O. Gilbert | 1,410 | 2.21% |
| | Socialist Labor | Nathan L. Griest | 667 | 1.05% |
| Majority | Majority | Majority | 24,531 | 38.47% |
| Total votes | Total votes | Total votes | 63,768 | 100% |
| | Silver Republican hold | Silver Republican hold | Silver Republican hold | Silver Republican hold |

### 1900

1900 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Silver Republican | John F. Shafroth (incumbent) | 54,591 | 55.32% |
| | Republican | Robert W. Bonynge | 41,518 | 42.07% |
| | Prohibition | S.H. Shellenger | 1,924 | 1.95% |
| | Socialist Labor | Joseph Smith | 326 | 0.33% |
| | Social Democratic | Charles M. Davis | 320 | 0.32% |
| Majority | Majority | Majority | 13,073 | 13.25% |
| Total votes | Total votes | Total votes | 98,679 | 100% |
| | Silver Republican hold | Silver Republican hold | Silver Republican hold | Silver Republican hold |

### 1902

1902 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | John F. Shafroth (incumbent) | 41,440 | 48.98% |
| | Republican | Robert W. Bonynge | 38,648 | 45.68% |
| | Socialist | Marshall DeWitt | 2,680 | 3.17% |
| | Prohibition | Franklin Moore | 1,832 | 2.17% |
| Majority | Majority | Majority | 2,792 | 3.30% |
| Total votes | Total votes | Total votes | 84,600 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1904

1904 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert W. Bonynge (incumbent) | 55,940 | 51.74% |
| | Democratic | Clay B. Whitford | 50,022 | 46.27% |
| | Prohibition | William C. Johnston | 2,153 | 1.99% |
| Majority | Majority | Majority | 5,918 | 5.47% |
| Total votes | Total votes | Total votes | 108,115 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1906

1906 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert W. Bonynge (incumbent) | 47,549 | 55.48% |
| | Democratic | Charles F. Tew | 31,133 | 36.32% |
| | Socialist | Luella Twining | 4,989 | 5.82% |
| | Prohibition | E.E. Evans | 2,039 | 2.38% |
| Majority | Majority | Majority | 16,416 | 19.16% |
| Total votes | Total votes | Total votes | 85,710 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1908

1908 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Atterson W. Rucker | 60,643 | 49.87% |
| | Republican | Robert W. Bonynge (incumbent) | 57,597 | 47.37% |
| | Socialist | S.S. Greear | 3,356 | 2.76% |
| Majority | Majority | Majority | 3,046 | 2.50% |
| Total votes | Total votes | Total votes | 121,596 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1910

1910 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Atterson W. Rucker (incumbent) | 40,458 | 40.77% |
| | Republican | James C. Burger | 37,966 | 38.26% |
| | Prohibition | George John Kindel | 17,144 | 17.28% |
| | Socialist | John W. Martin | 3,661 | 3.69% |
| Majority | Majority | Majority | 2,492 | 2.51% |
| Total votes | Total votes | Total votes | 99,229 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1912

1912 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | George John Kindel | 54,504 | 45.84% |
| | Progressive | W. J. Crank | 30,121 | 25.33% |
| | Republican | Rice W. Means | 24,887 | 20.93% |
| | Socialist | John W. Martin | 6,757 | 5.68% |
| | Prohibition | Otto A. Reinhardt | 2,642 | 2.22% |
| Majority | Majority | Majority | 24,383 | 20.51% |
| Total votes | Total votes | Total votes | 118,911 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1914

1914 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Benjamin C. Hilliard | 26,169 | 40.56% |
| | Republican | Horace F. Phelps | 21,569 | 33.43% |
| | Progressive | Archibald A. Lee | 8,729 | 13.53% |
| | Independent | Atterson W. Rucker | 5,445 | 8.44% |
| | Socialist | Benjamin Blumenberg | 2,612 | 4.05% |
| Majority | Majority | Majority | 4,600 | 7.13% |
| Total votes | Total votes | Total votes | 64,524 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1916

1916 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Benjamin C. Hilliard (incumbent) | 30,146 | 48.53% |
| | Republican | William N. Vaile | 26,121 | 42.05% |
| | Liberal | George John Kindel | 3,306 | 5.32% |
| | Socialist | Charles A. Ahlstrom | 2,551 | 4.11% |
| Majority | Majority | Majority | 4,025 | 6.48% |
| Total votes | Total votes | Total votes | 62,124 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1918

1918 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William N. Vaile | 27,815 | 54.19% |
| | Democratic | John L. Stack | 16,364 | 31.88% |
| | Independent | Benjamin C. Hilliard (incumbent) | 6,112 | 11.91% |
| | Socialist | Fred Underhill | 1,039 | 2.02% |
| Majority | Majority | Majority | 11,451 | 22.31% |
| Total votes | Total votes | Total votes | 51,330 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1920

1920 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William N. Vaile (incumbent) | 45,658 | 66.93% |
| | Democratic | Benjamin C. Hilliard | 22,557 | 33.07% |
| Majority | Majority | Majority | 23,101 | 33.86% |
| Total votes | Total votes | Total votes | 68,215 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1922

1922 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William N. Vaile (incumbent) | 32,939 | 55.48% |
| | Democratic | Benjamin C. Hilliard | 25,477 | 42.91% |
| | Farmer–Labor | Hattie K. Howard | 959 | 1.62% |
| Majority | Majority | Majority | 7,462 | 12.57% |
| Total votes | Total votes | Total votes | 59,375 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1924

1924 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William N. Vaile (incumbent) | 47,155 | 54.19% |
| | Democratic | James G. Edgeworth | 36,519 | 41.97% |
| | Farmer–Labor | Thomas O. Spacey | 2,686 | 3.09% |
| | Workers | Louis A. Zetlin | 654 | 0.75% |
| Majority | Majority | Majority | 10,636 | 12.22% |
| Total votes | Total votes | Total votes | 87,014 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1926

1926 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William N. Vaile (incumbent) | 39,909 | 54.86% |
| | Democratic | Benjamin C. Hilliard | 30,337 | 41.70% |
| | Farmer–Labor | Isaac Dunn | 1,972 | 2.71% |
| | Socialist | Clyde Robinson | 530 | 0.73% |
| Majority | Majority | Majority | 9,572 | 13.16% |
| Total votes | Total votes | Total votes | 72,748 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1927 (special)

1927 United States House of Representatives special election, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | S. Harrison White | 32,171 | 51.52% |
| | Republican | Francis J. Knauss | 27,456 | 43.97% |
| | Independent | George John Kindel | 2,556 | 4.09% |
| | Farmer–Labor | Huston Hugh Marrs | 261 | 0.42% |
| Majority | Majority | Majority | 4,715 | 7.55% |
| Total votes | Total votes | Total votes | 62,444 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1928

1928 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William R. Eaton | 63,258 | 58.08% |
| | Democratic | S. Harrison White (incumbent) | 44,713 | 41.05% |
| | Workers | William R. Dietrich | 949 | 0.87% |
| Majority | Majority | Majority | 18,545 | 17.03% |
| Total votes | Total votes | Total votes | 108,920 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1930

1930 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | William R. Eaton (incumbent) | 39,907 | 50.33% |
| | Democratic | Lawrence Lewis | 38,152 | 48.12% |
| | Farmer–Labor | W.R. Duke | 813 | 1.03% |
| | Communist | Louis A. Zeitlin | 411 | 0.52% |
| Majority | Majority | Majority | 1,755 | 2.21% |
| Total votes | Total votes | Total votes | 79,283 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1932

1932 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis | 70,826 | 54.41% |
| | Republican | William R. Eaton (incumbent) | 56,601 | 43.49% |
| | Socialist | Bruce Lamont | 1,926 | 1.48% |
| | Communist | Charles Guynn | 422 | 0.32% |
| | Farmer–Labor | W. R. Duke | 385 | 0.30% |
| Majority | Majority | Majority | 14,225 | 10.92% |
| Total votes | Total votes | Total votes | 130,160 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1934

1934 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis (incumbent) | 59,744 | 56.04% |
| | Republican | William R. Eaton | 34,073 | 31.96% |
| | Old Age Pension | Charles W. Varnum | 9,511 | 8.92% |
| | Socialist | Carle Whitehead | 2,540 | 2.38% |
| | Communist | George Bardwell | 743 | 0.70% |
| Majority | Majority | Majority | 25,671 | 24.08% |
| Total votes | Total votes | Total votes | 106,611 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1936

1936 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis (incumbent) | 100,704 | 68.96% |
| | Republican | Harry Zimmerhackel | 41,574 | 28.47% |
| | Farmer–Labor | Louella Grant Shirley | 2,675 | 1.83% |
| | Socialist | F. S. Kidneigh | 1,073 | 0.73% |
| Majority | Majority | Majority | 59,130 | 40.49% |
| Total votes | Total votes | Total votes | 146,026 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1938

1938 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis (incumbent) | 83,517 | 65.31% |
| | Republican | William I. Reilly | 42,758 | 33.44% |
| | Socialist | Edgar P. Sherman | 913 | 0.71% |
| | Prohibition | Oliver L. Barnes | 688 | 0.54% |
| Majority | Majority | Majority | 40,759 | 31.87% |
| Total votes | Total votes | Total votes | 127,876 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1940

1940 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis (incumbent) | 110,078 | 64.72% |
| | Republican | James D. Parriott | 59,427 | 34.94% |
| | Socialist | Ward Rogers | 577 | 0.34% |
| Majority | Majority | Majority | 50,651 | 29.78% |
| Total votes | Total votes | Total votes | 170,082 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1942

1942 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lawrence Lewis (incumbent) | 58,143 | 53.39% |
| | Republican | Olaf H. Jacobson | 50,083 | 45.99% |
| | Socialist | Ward Rogers | 681 | 0.63% |
| Majority | Majority | Majority | 8,060 | 7.40% |
| Total votes | Total votes | Total votes | 108,907 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1944 (special)

1944 United States House of Representatives special election, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | Dean M. Gillespie | 41,319 | 51.55% |
| | Democratic | Carl E. Wuertele | 38,394 | 47.90% |
| | Socialist | Edgar P. Sherman | 230 | 0.29% |
| | Independent | George M. Phillips | 160 | 0.20% |
| | Liberal | Frank H. Rice | 51 | 0.06% |
| Majority | Majority | Majority | 2,925 | 3.65% |
| Total votes | Total votes | Total votes | 80,154 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1944 (general)

1944 United States House of Representatives elections, Colorado's 1st district (general) :
| Party | Party | Candidate | Votes | % |
| | Republican | Dean M. Gillespie (incumbent) | 90,151 | 51.75% |
| | Democratic | Charles A. Graham | 83,253 | 47.79% |
| | Socialist | Edgar P. Sherman | 798 | 0.46% |
| Majority | Majority | Majority | 6,898 | 3.96% |
| Total votes | Total votes | Total votes | 174,202 | 100% |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 1946

1946 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | John A. Carroll | 60,513 | 51.75% |
| | Republican | Dean M. Gillespie (incumbent) | 55,724 | 47.66% |
| | Socialist | Edgar P. Sherman | 691 | 0.59% |
| Majority | Majority | Majority | 4,789 | 4.09% |
| Total votes | Total votes | Total votes | 116,928 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1948

1948 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | John A. Carroll (incumbent) | 106,096 | 64.84% |
| | Republican | Christopher F. Cusack | 57,541 | 35.16% |
| Majority | Majority | Majority | 48,555 | 29.68% |
| Total votes | Total votes | Total votes | 163,637 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1950

1950 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers | 70,165 | 50.31% |
| | Republican | Richard G. Luxford | 67,436 | 48.35% |
| | Independent | Tillman H. Eeb | 1,287 | 0.92% |
| | Socialist | Carle Whitehead | 585 | 0.42% |
| Majority | Majority | Majority | 2,729 | 1.96% |
| Total votes | Total votes | Total votes | 139,473 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1952

1952 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 101,864 | 50.78% |
| | Republican | Mason K. Knuckles | 97,442 | 48.57% |
| | Socialist | Carle Whitehead | 1,307 | 0.65% |
| Majority | Majority | Majority | 4,422 | 2.21% |
| Total votes | Total votes | Total votes | 200,613 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1954

1954 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 84,745 | 55.62% |
| | Republican | Ellen G. Harris | 67,210 | 44.11% |
| | Socialist | Carle Whitehead | 415 | 0.27% |
| Majority | Majority | Majority | 17,535 | 11.51% |
| Total votes | Total votes | Total votes | 152,370 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1956

1956 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 116,487 | 57.78% |
| | Republican | Robert S. McCollum | 85,127 | 42.22% |
| Majority | Majority | Majority | 31,360 | 15.56% |
| Total votes | Total votes | Total votes | 201,614 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1958

1958 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 107,567 | 66.66% |
| | Republican | John L. Harpel | 53,801 | 33.34% |
| Majority | Majority | Majority | 53,766 | 33.32% |
| Total votes | Total votes | Total votes | 161,368 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1960

1960 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 121,610 | 60.01% |
| | Republican | Robert D. Rolander | 81,042 | 39.99% |
| Majority | Majority | Majority | 40,568 | 20.02% |
| Total votes | Total votes | Total votes | 202,652 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1962

1962 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 94,680 | 56.00% |
| | Republican | William B. Chenoweth | 74,392 | 44.00% |
| Majority | Majority | Majority | 20,288 | 12.00% |
| Total votes | Total votes | Total votes | 169,072 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1964

1964 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 138,475 | 67.52% |
| | Republican | Glenn R. Jones | 65,423 | 31.90% |
| | Socialist Workers | Allen D. Taplin | 1,183 | 0.58% |
| Majority | Majority | Majority | 73,052 | 35.62% |
| Total votes | Total votes | Total votes | 205,081 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1966

1966 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 92,688 | 56.03% |
| | Republican | Greg Perason | 72,732 | 43.97% |
| Majority | Majority | Majority | 19,956 | 12.06% |
| Total votes | Total votes | Total votes | 165,420 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1968

1968 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Byron G. Rogers (incumbent) | 91,199 | 45.74% |
| | Republican | Frank A. Kemp, Jr. | 82,677 | 41.47% |
| | American Independent | Gordon G. Barnwall | 25,499 | 12.79% |
| Majority | Majority | Majority | 8,522 | 4.27% |
| Total votes | Total votes | Total votes | 199,375 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1970

1970 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike McKevitt | 84,643 | 51.50% |
| | Democratic | Craig S. Barnes | 74,444 | 45.30% |
| | Raza Unida | Salvadore Carpio, Jr. | 5,257 | 3.20% |
| Majority | Majority | Majority | 10,199 | 6.20% |
| Total votes | Total votes | Total votes | 164,344 | 100% |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### 1972

1972 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder | 101,832 | 51.56% |
| | Republican | Mike McKevitt (incumbent) | 93,733 | 47.46% |
| | Raza Unida | Maria Pauline Serna | 1,629 | 0.82% |
| | Socialist Workers | Fern Gapin | 301 | 0.15% |
| Majority | Majority | Majority | 8,099 | 4.10% |
| Total votes | Total votes | Total votes | 197,495 | 100% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 1974

1974 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 94,583 | 58.48% |
| | Republican | Frank Southworth | 66,046 | 40.84% |
| | American | Elmer B. Sachs | 1,105 | 0.68% |
| Majority | Majority | Majority | 27,637 | 17.64% |
| Total votes | Total votes | Total votes | 161,734 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1976

1976 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 103,037 | 53.22% |
| | Republican | Don Friedman | 89,384 | 46.17% |
| | Socialist Workers | Priscilla Schenk | 681 | 0.35% |
| | U.S. Labor | Lann Meyers | 508 | 0.26% |
| Majority | Majority | Majority | 13,653 | 7.05% |
| Total votes | Total votes | Total votes | 193,610 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1978

1978 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 82,742 | 61.46% |
| | Republican | Gene Hutcheson | 49,845 | 37.02% |
| | Socialist Workers | Susan Lorraine Adley | 2,043 | 1.52% |
| Majority | Majority | Majority | 32,897 | 24.44% |
| Total votes | Total votes | Total votes | 134,630 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1980

1980 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 107,364 | 59.77% |
| | Republican | Naomi Bradford | 67,804 | 37.75% |
| | Libertarian | John Mason | 3,888 | 2.16% |
| | Socialist Workers | Harold Sudmeyer | 566 | 0.32% |
| Majority | Majority | Majority | 52,355 | 25.68% |
| Total votes | Total votes | Total votes | 179,622 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1982

1982 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 94,969 | 60.26% |
| | Republican | Arch Decker | 59,009 | 37.44% |
| | Libertarian | Robin White | 3,619 | 2.30% |
| Majority | Majority | Majority | 35,960 | 22.82% |
| Total votes | Total votes | Total votes | 157,597 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1984

1984 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 126,348 | 61.97% |
| | Republican | Mary Downs | 73,993 | 36.29% |
| | Socialist Workers | Cathy Emminizer | 1,846 | 0.91% |
| | Libertarian | Dwight Filley | 1,686 | 0.83% |
| Majority | Majority | Majority | 52,355 | 25.68% |
| Total votes | Total votes | Total votes | 203,873 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1986

1986 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 106,113 | 68.37% |
| | Republican | Joy Wood | 49,095 | 31.63% |
| Majority | Majority | Majority | 57,018 | 36.74% |
| Total votes | Total votes | Total votes | 155,208 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1988

1988 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 133,922 | 69.93% |
| | Republican | Joy Wood | 57,587 | 30.07% |
| Majority | Majority | Majority | 76,335 | 39.86% |
| Total votes | Total votes | Total votes | 191,509 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1990

1990 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 82,176 | 63.71% |
| | Republican | Gloria Gonzales Roemer | 46,802 | 36.29% |
| Majority | Majority | Majority | 35,374 | 27.42% |
| Total votes | Total votes | Total votes | 128,978 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1992

1992 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 156,629 | 68.84% |
| | Republican | Raymond Diaz Aragon | 70,902 | 31.16% |
| Majority | Majority | Majority | 85,727 | 37.68% |
| Total votes | Total votes | Total votes | 227,531 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1994

1994 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pat Schroeder (incumbent) | 93,123 | 59.98% |
| | Republican | William F. Eggert | 61,978 | 39.92% |
| | Write-in | Write-ins | 154 | 0.10% |
| Majority | Majority | Majority | 31,145 | 20.06% |
| Total votes | Total votes | Total votes | 155,255 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1996

1996 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette | 112,631 | 56.93% |
| | Republican | Joe Rogers | 79,540 | 40.20% |
| | Libertarian | Richard Combs | 5,668 | 2.86% |
| Majority | Majority | Majority | 33,091 | 16.73% |
| Total votes | Total votes | Total votes | 197,839 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 1998

1998 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 116,628 | 66.91% |
| | Republican | Nancy McClanahan | 52,452 | 30.09% |
| | Libertarian | Richard Combs | 5,225 | 3.00% |
| Majority | Majority | Majority | 64,176 | 36.82% |
| Total votes | Total votes | Total votes | 174,305 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2000

2000 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 141,831 | 68.71% |
| | Republican | Jesse L. Thomas | 56,291 | 27.27% |
| | Libertarian | Richard Combs | 5,852 | 2.83% |
| | Reform | Lyle Nasser | 2,452 | 1.19% |
| | Write-in | Write-ins | 8 | 0.00% |
| Majority | Majority | Majority | 85,540 | 41.44% |
| Total votes | Total votes | Total votes | 206,434 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2002

2002 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 111,718 | 66.28% |
| | Republican | Ken Chlouber | 49,884 | 29.59% |
| | Green | Ken Seaman | 3,209 | 1.90% |
| | Libertarian | Kent Leonard | 2,584 | 1.53% |
| | Constitution | George C. Lilly | 1,169 | 0.69% |
| Majority | Majority | Majority | 61,834 | 36.69% |
| Total votes | Total votes | Total votes | 168,564 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2004

2004 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 177,077 | 73.50% |
| | Republican | Roland Chicas | 58,659 | 24.35% |
| | Constitution | George C. Lilly | 5,193 | 2.16% |
| Majority | Majority | Majority | 118,418 | 49.15% |
| Total votes | Total votes | Total votes | 240,929 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2006

2006 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 129,446 | 79.77% |
| | Green | Thomas D. Kelly | 32,825 | 20.23% |
| Majority | Majority | Majority | 96,621 | 59.54% |
| Total votes | Total votes | Total votes | 162,271 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2008

2008 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 203,756 | 71.94% |
| | Republican | George C. Lilly | 67,346 | 23.78% |
| | Libertarian | Martin L. Buchanan | 12,136 | 4.28% |
| Majority | Majority | Majority | 136,410 | 48.16% |
| Total votes | Total votes | Total votes | 283,249 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2010

2010 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 140,073 | 67.42% |
| | Republican | Mike Fallon | 59,747 | 28.76% |
| | Green | Gary Swing | 2,923 | 1.41% |
| | Libertarian | Clint Jones | 2,867 | 1.38% |
| | Constitution | Chris Styskal | 2,141 | 1.03% |
| Majority | Majority | Majority | 80,326 | 38.66% |
| Total votes | Total votes | Total votes | 207,751 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2012

2012 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 237,579 | 68.23% |
| | Republican | Danny Stroud | 93,217 | 26.77% |
| | Libertarian | Frank Atwood | 12,585 | 3.61% |
| | Green | Gary Swing | 4,829 | 1.39% |
| Majority | Majority | Majority | 144,362 | 41.46% |
| Total votes | Total votes | Total votes | 348,228 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2014

2014 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 183,281 | 65.81% |
| | Republican | Martin Walsh | 80,682 | 28.97% |
| | Libertarian | Frank Atwood | 9,292 | 3.34% |
| | Independent | Danny Stroud | 5,236 | 1.88% |
| Majority | Majority | Majority | 102,599 | 36.84% |
| Total votes | Total votes | Total votes | 278,494 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2016

2016 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 257,254 | 67.87% |
| | Republican | Casper Stockham | 105,030 | 27.71% |
| | Libertarian | Frank Atwood | 16,752 | 4.42% |
| Majority | Majority | Majority | 152,224 | 40.16% |
| Total votes | Total votes | Total votes | 379,036 | 100% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2018

2018 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 272,886 | 73.81% |
| | Republican | Casper Stockham | 85,207 | 23.05% |
| | Libertarian | Raymon Doane | 11,600 | 3.14% |
| Majority | Majority | Majority | 187,679 | 50.76% |
| Total votes | Total votes | Total votes | 369,693 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

2020 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 331,621 | 73.65% |
| | Republican | Shane Bolling | 105,955 | 23.53% |
| | Libertarian | Kyle Furey | 8,749 | 1.94% |
| | Unity | Paul Noel Fiorino | 2,524 | 0.56% |
| | Approval Voting | Jan Kok | 1,441 | 0.32% |
| Majority | Majority | Majority | 225,666 | 50.12% |
| Total votes | Total votes | Total votes | 450,290 | 100.0% |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2022

2022 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 226,929 | 80.3 |
| | Republican | Jennifer Qualteri | 49,530 | 17.5 |
| | Libertarian | John Kittleson | 6,157 | 2.2 |
| | Green | Iris Boswell (write-in) | 70 | 0.0 |
| Total votes | Total votes | Total votes | 282,686 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2024

2024 United States House of Representatives elections, Colorado's 1st district :
| Party | Party | Candidate | Votes | % |
| | Democratic | Diana DeGette (incumbent) | 264,606 | 76.5 |
| | Republican | Valdamar Archuleta | 74,598 | 21.6 |
| | Unity | Critter Milton | 4,084 | 1.2 |
| | Approval Voting | Daniel Lutz | 2,351 | 0.7 |
| | Write-in | Write-in | 96 | 0.0 |
| Total votes | Total votes | Total votes | 345,735 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |