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.
2016
2012
Federal and statewide results Year Office Results 2020 President Biden 71.2 – 26.2% 2018 Governor Polis 68.2 – 28.5% 2016 President Clinton 62.1 – 29.2% 2014 Senate Udall 59.2 – 35.6% Governor Hickenlooper 60.3 – 34.4% 2012 President Obama 62.3 – 35.3%
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