Colorado's 4th congressional district (CO-04)
Colorado's 4th congressional district (CO-04) covers parts or all of 21 counties, including Baca County, Bent County, Cheyenne County, Crowley County, Elbert County and Kiowa County, and 143 ZIP codes (105 wholly inside it). Its 2020 population was 721,794. This is the map in force for the November 3, 2026 election.
Who represents CO-04
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (CO-04) | Lauren Boebert (R) | 202-225-4761 |
| U.S. Senator | John W. Hickenlooper (D) | 202-224-5941 · contact form |
| U.S. Senator | Michael F. Bennet (D) | 202-224-5852 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in CO-04 |
|---|---|
| Baca County | 100% |
| Bent County | 100% |
| Cheyenne County | 100% |
| Crowley County | 100% |
| Elbert County | 100% |
| Kiowa County | 100% |
| Kit Carson County | 100% |
| Lincoln County | 100% |
| Logan County | 100% |
| Morgan County | 100% |
| Phillips County | 100% |
| Prowers County | 100% |
| Sedgwick County | 100% |
| Washington County | 100% |
| Yuma County | 100% |
| Douglas County | 99% |
| Larimer County | 30% |
| Weld County | 18% |
| Arapahoe County | 5.8% |
| Adams County | 2.3% |
| El Paso County | 1.1% |
ZIP codes
Percentages mark ZIPs only partly in CO-04: the share of that ZIP's residents inside it.
- 69168 (3.5%)
- 80013 (8.5%)
- 80015 (30%)
- 80016 (<0.1%)
- 80018 (11%)
- 80022 (0.2%)
- 80101
- 80102 (99%)
- 80103
- 80104
- 80105
- 80106 (34%)
- 80107
- 80108
- 80109
- 80112 (12%)
- 80116
- 80117
- 80118
- 80120 (0.3%)
- 80124
- 80125 (100%)
- 80126
- 80129
- 80130
- 80131
- 80134
- 80135 (99%)
- 80136
- 80137 (67%)
- 80138 (99%)
- 80524 (11%)
- 80528 (11%)
- 80537 (85%)
- 80538 (94%)
- 80546
- 80547 (<0.1%)
- 80549 (92%)
- 80550
- 80603 (7.3%)
- 80610
- 80611
- 80612 (96%)
- 80615 (98%)
- 80622
- 80624 (37%)
- 80631 (<0.1%)
- 80642 (87%)
- 80643
- 80644 (7.8%)
- 80645 (3.8%)
- 80648
- 80649
- 80650
- 80652
- 80653
- 80654
- 80701
- 80705
- 80720
- 80721
- 80722
- 80723
- 80726
- 80727
- 80728
- 80729
- 80731
- 80732
- 80733
- 80734
- 80735
- 80736
- 80737 (99%)
- 80740
- 80741
- 80742
- 80743
- 80744
- 80745
- 80746
- 80747
- 80749
- 80750
- 80751
- 80754
- 80755
- 80757
- 80758
- 80759
- 80801
- 80802
- 80804
- 80805
- 80807
- 80808 (53%)
- 80810
- 80812
- 80815
- 80818
- 80821
- 80822
- 80823
- 80824
- 80825
- 80826
- 80828
- 80830
- 80831 (6.7%)
- 80832
- 80833
- 80834
- 80835
- 80836
- 80861
- 80862
- 80864 (99%)
- 81021
- 81029
- 81033
- 81036
- 81039 (2.6%)
- 81041
- 81043
- 81044
- 81045
- 81047
- 81050 (0.3%)
- 81052
- 81054 (100%)
- 81057
- 81058 (7.5%)
- 81062
- 81063
- 81064 (87%)
- 81071
- 81073
- 81076
- 81084
- 81087
- 81090
- 81092
- 82082 (0.2%)
Towns
Agate CCD, Akron CCD, Arriba CCD, Ault CCD, Brush CCD, Burlington CCD, Campo CCD, Castle Rock CCD, Cheyenne Wells CCD, Cope CCD, Crook CCD, Eads CCD, Elizabeth CCD, Flagler CCD, Fleming CCD, Fort Morgan CCD, Granada CCD, Grover CCD, Haswell CCD, Haxtun CCD, Holly CCD, Holyoke CCD, Hugo CCD, Idalia-Joes CCD, Julesburg CCD, Karval CCD, Kit Carson CCD, Lamar CCD, Las Animas CCD, Limon CCD, McClave CCD, Merino CCD, Ordway CCD, Otis CCD, Peetz CCD, Pritchett CCD, Raymer CCD, Sedalia CCD, Sheridan Lake CCD and Simla CCD and others.
Get this in your AI agent
Your agent can draw every precinct in CO-04, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:0804", children_level="precinct", include_districts=True)