2018Final results
2018 election for Colorado House District 5
Colorado House of Representatives · Colorado
Alex Valdez (D) won with 79.0% of the vote, defeating Katherine E. Whitney (R) by 61.2 points.
Alex ValdezDemocrat · winner
79.0%27,131
Katherine E. WhitneyRepublican
17.9%6,136
Rory LambertonLibertarian
3.1%1,061
34,328 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