Incumbent GOP Congressman Mike Turner has held onto his seat against Democratic challenger and political newcomer Theresa Gasper.
Turner's 10th District win sends him back to Washington for a ninth term.
Turner campaigned largely on his record of supporting Wright-Patterson Air Force Base and efforts to grow Dayton’s economy.
Real-estate developer Gasper was one of a number of women entering national politics for the first time this year.
She carried an endorsement from the anti-Trump group DIFA, formerly known as Dayton Indivisible For All.
Libertarian Party candidate David Harlow was also on the ballot and won around 2 percent of the votes.