2018Final results
2018 election for Colorado House District 58
Colorado House of Representatives · Colorado
Marc Catlin (R) won with 62.8% of the vote, defeating Seth Cagin (D) by 25.6 points.
Marc CatlinRepublican · winner
62.8%21,912
Seth CaginDemocrat
37.2%12,972
34,884 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET