Jefferson County, Colorado
What we have for Jefferson County today, and what is coming.
Basics
- County code (FIPS): 08059
- Land area: 764 square miles
- Population: 582,910
Federal money spent here
Fiscal year 2026: $6.2 billion in federal contracts, grants, loans and other awards for work done in Jefferson County.
Who represents Jefferson County
U.S. Senate (whole state): Michael F. Bennet (Democrat), John W. Hickenlooper (Democrat).
U.S. House districts that include part of this county
| District | Member | Share of county land |
|---|---|---|
| Congressional District 7 | Brittany Pettersen (Democrat) | 93.4% |
| Congressional District 2 | Joe Neguse (Democrat) | 4.3% |
| Congressional District 6 | Jason Crow (Democrat) | 2.4% |
| Congressional District 1 | Diana DeGette (Democrat) | 0% |
State senate districts
| District | Member | Share of county land |
|---|---|---|
| State Senate District 4 | Mark Baisley (Republican) | 49% |
| State Senate District 20 | Lisa Cutter (Democratic) | 35.6% |
| State Senate District 22 | Jessie Danielson (Democratic) | 6.6% |
| State Senate District 19 | Lindsey Daugherty (Democratic) | 6.3% |
| State Senate District 16 | Chris Kolker (Democratic) | 2.5% |
| State Senate District 26 | Jeff Bridges (Democratic) | 0% |
| State Senate District 32 | Robert Rodriguez (Democratic) | 0% |
State house / assembly districts
| District | Member | Share of county land |
|---|---|---|
| State House District 25 | Tammy Story (Democratic) | 60.8% |
| State House District 27 | Brianna Titone (Democratic) | 23.5% |
| State House District 23 | Monica Duran (Democratic) | 3.7% |
| State House District 28 | Sheila Lieder (Democratic) | 3.6% |
| State House District 24 | Lisa Feret (Democratic) | 3.3% |
| State House District 29 | Lori Goldstein (Democratic) | 2.3% |
| State House District 30 | Rebekah Stewart (Democratic) | 2.3% |
| State House District 38 | Gretchen Rydin (Democratic) | 0.4% |
| State House District 35 | Lorena García (Democratic) | 0.1% |
| State House District 1 | Javier Mabrey (Democratic) | 0% |
Matched by district number using the U.S. Census Bureau 2020 county–district relationship files (land area overlap; districts may have been redrawn since). Your exact district depends on your address: U.S. House · state legislators.
County government
Find the official county website and contacts in the USA.gov local government directory or the National Association of Counties explorer.
Sources: U.S. Census Bureau Gazetteer (county list, public domain); USAspending.gov (U.S. Treasury). Built 2026-11-03 15:28.