The 1978 Ohio Secretary of State election was held on November 7, 1978, to elect the Ohio Secretary of State. Primaries were held on June 6, 1978. Democratic Ohio State Senator Anthony J. Celebrezze Jr. defeated longtime Republican incumbent Ohio Secretary of State Ted W. Brown by a razor-thin margin of 0.3 percentage points.

Republican primary Candidates Ted W. Brown, incumbent Ohio Secretary of State (1951–1979) Campaign Brown won renomination without opposition. Results

Democratic primary Candidates Anthony J. Celebrezze Jr., Ohio State Senator (1975–1978) Campaign Celebrezze won the Democratic nomination unopposed. Results

General election Candidates Anthony J. Celebrezze Jr., Ohio State Senator (1975–1978) (Democratic) Ted W. Brown, incumbent Ohio Secretary of State (1951–1979) Results

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