Congressional district · Boundaries of the 119th Congress

Wisconsin's 4th district

Wisconsin's 4th district has 724,913 residents on 140 mi² of land. It is represented by Gwen Moore (D-WI-4). Federal contract obligations attributed to it reached $213.8M in FY2026.

Residents
724,913
Land area
140 mi²
Counties
1
Representative
Gwen Moore
Open in the Congress explorer
Map of Wisconsin's 4th district within Wisconsin

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. Milwaukee County100% of the district · 78% 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
$213.8M
Per resident
$295
Rank in Wisconsin
6 of 8
Contract actions
5,264
New awards: 3,486

By fiscal year

  1. 248.9MFY2017
  2. 292MFY2018
  3. 334.6MFY2019
  4. 314.1MFY2020
  5. 271.5MFY2021
  6. 350MFY2022
  7. 316.9MFY2023
  8. 342.8MFY2024
  9. 316.9MFY2025
  10. 213.8MFY2026

Top buyers

  1. Defense Logistics Agency$77.6M36%
    Department of Defense
  2. Department of Veterans Affairs$49.4M23%
  3. Department of the Army$23.4M11%
    Department of Defense
  4. Department of the Navy$12.3M5.7%
    Department of Defense
  5. Office of the Assistant Secretary for Administration and Management$9.8M4.6%
    Department of Labor
  6. Environmental Protection Agency$6.8M3.2%
  7. Health Resources and Services Administration$6.3M2.9%
    Department of Health and Human Services
  8. Internal Revenue Service$5.9M2.8%
    Department of the Treasury

Top recipients

  1. S3 AERODEFENSE LLC$20.3M9.5%
    282 awards
  2. DERCO AEROSPACE, INC.$20.1M9.4%
    960 awards
  3. CLARIOS, LLC$16.2M7.6%
    36 awards
  4. OSHKOSH DEFENSE LLC$15.2M7.1%
    501 awards
  5. HORIZONS YOUTH SERVICES, L.C.$9.6M4.5%
    1 award
  6. THE MEDICAL COLLEGE OF WISCONSIN, INC.$7.2M3.4%
    27 awards
  7. KPH CONSTRUCTION CORP$6M2.8%
    1 award
  8. BEYOND VISION INC$5.9M2.8%
    3 awards
  9. COMMAND CYBER SOLUTIONS LLC$5.9M2.8%
    1 award
  10. JOHNSON CONTROLS, INC$5.1M2.4%
    46 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.