In the November 2016 elections, the Democratic Party of Oregon lost one seat in the Senate leaving a 17–13 majority and maintaining its 35–25 control of the House.

[1] Based on the results of the 2016 elections, the Oregon State Senate is composed of 17 Democrats and 13 Republicans.

Republicans gained one seat in District 3.

[1] Senate President: Peter Courtney (D–11 Salem) President Pro Tempore: Laurie Monnes Anderson (D–25 Gresham) Majority Leader: Ginny Burdick (D–18 Portland) Minority Leader: Ted Ferrioli (R–30 John Day) until November 2017; Jackie Winters (R-10 Salem) after November 2017 Based on the results of the 2016 elections, the Oregon House of Representatives is composed of 35 Democrats and 25 Republicans.

[1] Speaker: Tina Kotek (D–44 Portland) Speaker Pro Tempore: Paul Holvey (D-8 Eugene) Majority Leader: Jennifer Williamson (D–36 Portland) Minority Leader: Mike McLane (R–55 Powell Butte)