2006Final results
2006 election for Oregon House District 4
Oregon House of Representatives · Oregon
Dennis Richardson (R) won with 69.7% of the vote, defeating Richard Koopmans (D) by 39.4 points.
Dennis RichardsonRepublican · winner · incumbent
69.7%16,604
Richard KoopmansDemocrat
30.3%7,214
23,818 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2006
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET