Who Represents Colorado’s 4th Congressional District
Colorado’s 4th Congressional District is currently represented by Greg Lopez, a Republican who won a 2024 special election after Ken Buck’s resignation. The district covers rural eastern Colorado, portions of Douglas County, and includes counties such as Lincoln, Washington, Kit Carson, and parts of Adams and Douglas. This seat has historically leaned Republican in presidential and midterms. For official updates on legislation, committees, and voting records, visit house.gov/lopez and the official House directory.
District Boundaries and Geography
The 4th CD is a predominantly rural and exurban district east of Denver. It includes parts of the Denver metro’s southern fringe and stretches into eastern plains counties. Boundaries are redrawn every ten years following the census; the current map took effect in 2022 after Colorado’s reapportionment. Population centers include Castle Rock, Parker, and several smaller county seats. The district is one of Colorado’s largest by area but less densely populated than the 1st or 2nd districts, shaping campaign messaging and constituent services.
Core Facts at a Glance
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Current Representative | Greg Lopez (R) | Official House roster |
| District Type | Congressional district | U.S. Census Bureau |
| Map Effective | 2022 | Colorado Reapportionment Commission |
| Major Counties | Lincoln, Washington, Kit Carson, parts of Adams and Douglas | Colorado General Assembly |
| 2024 Special Election | Greg Lopez elected June 2024 | Colorado Secretary of State |
Recent Electoral History
In the 2022 midterm elections, the 4th CD elected Ken Buck (R). Buck resigned in 2024, prompting a special election in June 2024, which Greg Lopez won. In presidential politics, the district has consistently supported Republican candidates by double-digit margins since 2000, though Democrats have made gains in certain suburban pockets. Competitive races typically occur in open-seat cycles rather than in reliably red territory. Voter registration trends show a Republican edge, but modest shifts can influence local and down-ballot outcomes.
Demographics and Key Issues
According to the U.S. Census and American Community Survey, the district’s population is predominantly White, with a notable Hispanic community, especially near metro counties. Agriculture, energy, and small business are economic pillars; water and rural broadband are recurring policy concerns. Constituent services often revolve with veterans’ affairs, Social Security, and USDA programs. Because the district includes both rural counties and fast-growing exurbs, local priorities can vary by region, from irrigation infrastructure to suburban growth management.
How to Engage with Your Representative
- Find contact and district office information at house.gov/lopez or by calling the Capitol switchboard (202) 224-3121.
- Attend town halls and in-district meetings, often advertised via social media and local news.
- Track legislation using Congress.gov by searching for Representative Greg Lopez or the 4th CD’s sponsored bills.
- Register and vote using Colorado’s online portal at vote.colorado.gov, noting registration deadlines and ballot-by-mail options.
- Submit comments during markups or district hearings by following committee notices on house.gov committees.
Additional Resources and Further Reading
For deeper analysis, consult the Colorado General Assembly’s redistricting materials, the Census Bureau’s redistricting data, and nonpartisan outlets that explain rural-urban divides in Colorado politics. House committees related to agriculture, natural resources, and veterans’ affairs are relevant to many constituent priorities in the 4th CD. Reliable sources include government websites, local news archives, and academic research on rural representation. Understanding district boundaries, election cycles, and service channels helps residents navigate civic engagement effectively.