Colorado's 17th Senate district

Colorado's 17th Senate district is one of 35 districts in the Colorado Senate. It was previously represented by Democrat Sonya Jaquez Lewis from 2021 until her resignation in 2025. Katie Wallace was selected to represent the district by vacancy committee in March 2025.

Geography

District 17 is based in eastern Boulder County, southwestern Weld County, and northwestern Broomfield County, covering Lafayette, Longmont, and Erie.
The district is predominantly located in Colorado's 2nd congressional district, extends into a portion of the 7th congressional district, and overlaps with the 11th, 12th, 19th and 49th districts of the Colorado House of Representatives.

Recent election results

Colorado state senators are elected to staggered four-year terms; under normal circumstances, the 17th district holds elections in presidential years.

2020

In 2018, Senator Matt Jones was elected to the Boulder County Board of County Commissioners, and then-State Rep. Mike Foote was chosen to replace him in the Senate. Foote chose not to seek a full term in 2020, however, and his successor in the State House, Sonya Jaquez Lewis, ran instead.