Two Republicans, John Anderson of Enon and John Mitchel of Beavercreek, are challenging U.S. Rep. Mike Turner, R-Dayton, in the 10th District. Both Mitchel and Anderson have run for Congress repeatedly and unsuccessfully, with Mitchel also running as an Independent and Anderson a Libertarian in the past.
RELATED: Turner faces familiar foe in May primary
Democrats filing in that race include: Theresa Gasper of Beavercreek, Robert Klepinger of Dayton, who was beaten twice by Turner in previous General Elections; and Michael Milisits of Huber Heights.
RELATED: Local Democratic candidate for Congress says Bernie Sanders inspired him
RELATED: Democrat Theresa Gasper launches run against Congressman Turner
The district includes all of Montgomery and Greene counties and the northern half of Fayette County.
Incumbent U.S. Rep. Warren Davidson, R-Troy, filed for re-election to his 8th district seat and faces no opposition in the primary. Davidson replaced former U.S. House Speaker John Boehner, who retired in 2015.
RELATED: Fixing ‘broken things:’ Davidson talks about 18 months in Congress
Democrats who filed include Bill Ebben and Vanessa Enoch, both of West Chester Twp., Ted Jones of Piqua, and Matthew J. Guyette and Stephen D. Shaw, both of Greenville.
The 8th district includes all of Butler, Preble, Darke, Miami and Clark counties and the southern half of Mercer County.
U.S. Rep. Jim Jordan, R-Urbana, who has carved out a major national profile as a leader of the conservative Freedom Caucus in Congress, faces a primary challenge from Joseph Miller of Marion.
RELATED: Jim Jordan says John Boehner is ‘angry,’ ‘bitter’
Four Democrats filed to run in the sprawling district. They are Norbert G. Dennerll Jr. of Elyria, Janet Garrett of Oberlin, Leah Sellers of Marysville, and Cody James Slatzer-Rose of New Albany.
The 4th district includes all of Champaign, Shelby, Union, Logan, Auglaize, Allen, Crawford, Seneca and Sandusky counties and parts of Mercer, Marion, Huron, Erie and Lorain counties.
U.S. Rep. Steve Chabot, R-Cincinnati, faces a Republican primary race against Samuel Ronan of Springboro. On the Democratic side, petitions were filed by Hamilton County Clerk of Courts Aftab Pureval and Laura Ann Weaver, both of Cincinnati.
RELATED: Ohio members of Congress, Senate react to State of the Union
The 1st district includes all of Warren County and much of Hamilton County.
U.S. Rep. Brad Wenstrup, R-Cincinnati, has no primary opposition. Democrats who filed are Janet Everhard of New Richmond and Jill Schiller of Cincinnati.
RELATED: Cincinnati congressman did CPR, helped victims after train crash
The 2nd district includes parts of Hamilton, Ross and Scioto counties and all of Clermont, Brown, Highland, Adams and Pike counties.
Other stories by Lynn Hulsey
Ohio Supreme Court ruling against abortion clinics could impact Kettering clinic
U.S. Sen. Portman criticizes Trump for calling Democrats ‘treasonous’ during his Cincinnati visit
Pregnant inmates have local jails scrambling to provide care
Taylor challenges DeWine to a debate; says he knows he would lose