[1] To vote by mail, registered Ohio voters must have requested a ballot by October 31, 2020.

All of Ohio's 16 seats in the United States House of Representatives were up for election in 2020.

Ohio's delegation to the United States House of Representatives remained at 12 Republicans and 4 Democrats.

Joel O'Dorisio (D) Kathy Wyenandt (D) Kent Keller (I) Mark Fogel (D) Daniel Brown (D) Charles Ballard (D) Ken Poling (D) Ryan Ottney (D) Crystal Lett (D) Besty Rader (D) Christian Johnson (D) Ryan Hunger (D) Tom Jackson (D) Craig Swartz (D) Robert Taylor (I) Micheal Downey (R) Micheal Fletcher (D) Sean O'Brien (D) (i) All 99 seats in the Ohio House of Representatives are up for election in 2020.

Terms are six years, and justices may run for re-election an unlimited number of times before their 70th birthday.