Congressional district · Boundaries of the 119th Congress

Colorado's 4th district

Colorado's 4th district has 751,717 residents on 32,138 mi² of land. It is represented by Lauren Boebert (R-CO-4). Federal contract obligations attributed to it reached $2.4B in FY2026.

Residents
751,717
Land area
32,138 mi²
Counties
21
Representative
Lauren Boebert
Open in the Congress explorer
Map of Colorado's 4th district within Colorado

Members for this district

Members who held this seat while these boundaries were in force, newest first.

Senators

The state's senators today, or on the last day of these boundaries for an older plan.

Counties

Share of the district's residents living in each county, and share of the county's residents living in the district (2020 census tracts weighted by their overlap).

  1. Douglas County50% of the district · 99% of the county
  2. Larimer County14% of the district · 29% of the county
  3. Weld County8.0% of the district · 17% of the county
  4. Arapahoe County6.6% of the district · 7.5% of the county
  5. Morgan County3.9% of the district · 100% of the county
  6. Elbert County3.7% of the district · 100% of the county
  7. Logan County2.8% of the district · 100% of the county
  8. Prowers County1.6% of the district · 100% of the county
  9. Adams County1.5% of the district · 2.2% of the county
  10. Yuma County1.3% of the district · 100% of the county
  11. El Paso County1.1% of the district · 1.1% of the county
  12. Kit Carson County0.9% of the district · 100% of the county
  13. Crowley County0.8% of the district · 100% of the county
  14. Lincoln County0.7% of the district · 100% of the county
  15. Bent County0.7% of the district · 100% of the county
  16. Washington County0.6% of the district · 100% of the county
  17. Phillips County0.6% of the district · 100% of the county
  18. Baca County0.5% of the district · 100% of the county
  19. Sedgwick County0.3% of the district · 100% of the county
  20. Cheyenne County0.2% of the district · 100% of the county
  21. Kiowa County0.2% of the district · 100% of the county

Federal contracts

Contract obligations attributed to the district by each action's county and its award's ZIP code (land shares through census tracts); an estimate where ZIP codes cross district lines.

Obligations · FY2026
$2.4B
Per resident
$3,150
Rank in Colorado
2 of 8
Contract actions
3,249
New awards: 1,729

By fiscal year

  1. 588.7MFY2017
  2. 529.3MFY2018
  3. 899.6MFY2019
  4. 829.4MFY2020
  5. 2.2BFY2021
  6. 3BFY2022
  7. 3BFY2023
  8. 2.2BFY2024
  9. 3.2BFY2025
  10. 2.4BFY2026

Top buyers

  1. Department of the Air Force$1.1B48%
    Department of Defense
  2. Department of the Navy$735.9M31%
    Department of Defense
  3. National Aeronautics and Space Administration$400.6M17%
  4. Department of Veterans Affairs$18.6M0.8%
  5. Departmental Offices$16.6M0.7%
    Department of the Interior
  6. U.S. Immigration and Customs Enforcement$13.5M0.6%
    Department of Homeland Security
  7. U.S. Customs and Border Protection$12M0.5%
    Department of Homeland Security
  8. Office of the Chief Financial Officer$6.6M0.3%
    Department of Agriculture

Top recipients

  1. LOCKHEED MARTIN CORP$2.2B92%
    32 awards
  2. SIERRA NEVADA COMPANY, LLC$59.4M2.5%
    3 awards
  3. CO FIRE AVIATION, INC.$13.5M0.6%
    4 awards
  4. THE GEO GROUP, INC.$13.4M0.6%
    1 award
  5. EPOCH CONCEPTS LLC$11.2M0.5%
    3 awards
  6. ICR, INC.$11M0.5%
    19 awards
  7. BRANDES ASSOCIATES, INC.$9.6M0.4%
    1 award
  8. PERATON RISK DECISION INC.$9.5M0.4%
    3 awards
  9. WOODWARD, INC.$3.6M0.2%
    48 awards
  10. LUMEN TECHNOLOGIES GOVERNMENT SOLUTIONS, INC.$3.2M0.1%
    3 awards

Other boundaries

District lines change between plans; each plan keeps its own page.

Sources and method

Every figure on this page traces to these records.

  • Congressional district boundaries and relationship files (U.S. Census Bureau)U.S. Census Bureau, Cartographic Boundary Files (congressional districts) and 2020 relationship files · release cd116+cd118+cd119 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
  • Members of Congress, their terms, committees and identifiers (The @unitedstates project (from the Biographical Directory of the U.S. Congress, the House and the Senate))unitedstates/congress-legislators: legislators, committees and current committee membership · data current to Oct 3, 2026 · loaded Oct 3, 2026 · license: CC0 1.0 (public domain dedication)
  • ZIP code (ZCTA) to congressional district crosswalk (U.S. Census Bureau)U.S. Census Bureau, 2020 relationship files (ZCTAs, tracts and congressional districts); shares computed by Analisa · release 2020 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
  • Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov)USAspending.gov, prime award contract transactions (FPDS) · data current to Oct 3, 2026 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
  • Money and votes are shown side by side; neither explains the other.