Ohio Secretary of State elections
The voters of the U.S. state of Ohio elect a secretary of state for a four-year term.
| Year | Democratic | Republican | Other |
| 2018 | Kathleen Clyde: 1,987,916 | Frank LaRose: 2,166,125 | Dustin R. Nanna : 99,808 |
| 2014 | Nina Turner: 1,074,475 | Jon A. Husted: 1,811,020 | Kevin Knedler |
| 2010 | Maryellen O'Shaughnessy : 1,555,705 | Jon A. Husted : 2,013,674 | Charlie Earl : 182,977 |
| 2006 | Jennifer L. Brunner : 2,104,114 | Greg Hartmann : 1,546,454 | Tim Kettler : 78,080 John A. Eastman : 94,706 |
| 2002 | Bryan Flannery : 1,256,428 | J. Kenneth Blackwell : 1,827,995 | |
| 1998 | Charleta B. Tavares: 1,404,081 | J. Kenneth Blackwell: 1,789,105 | |
| 1994 | Dan Brady: 1,150,460 | Robert A. Taft II: 2,116,258 | |
| 1990 | Sherrod Brown: 1,604,058 | Robert A. Taft II: 1,809,416 | |
| 1986 | Sherrod Brown: 1,805,833 | Vincent C. Campanella: 1,217,803 | |
| 1982 | Sherrod Brown: 1,739,602 | Virgil E. Brown: 1,362,079 | |
| 1978 | Anthony J. "Tony" Celebrezze Jr.: 1,365,219 | Ted W. Brown: 1,356,959 | |
| 1974 | Tony P. Hall: 1,343,603 | Ted W. Brown: 1,462,776 | |
| 1970 | John F. Kennedy: 1,362,041 | Ted W. Brown: 1,606,920 | |
| 1966 | James D. Nolan: 1,037,710 | Ted W. Brown: 1,674,600 | |
| 1962 | Charles L. Babcock | Ted W. Brown | |
| 1958 | Asher W. Sweeney: 1,464,726 | Ted W. Brown: 1,580,628 | |
| 1956 | Hubert Lynch: 1,336,885 | Ted W. Brown: 1,985,368 | |
| 1954 | Robert W. Reider: 1,069,526 | Ted W. Brown: 1,339,076 | |
| 1952 | Charles F. Sweeney: 1,522,908 | Ted W. Brown: 1,792,819 | |
| 1950 | Charles F. Sweeney: 1,339,492 | Ted W. Brown: 1,347,251 | |
| 1948 | Charles F. Sweeney: 1,501,305 | Edward J. Hummel: 1,310,704 | |
| 1946 | Charles F. Sweeney | Edward J. Hummel | |
| 1944 | A Lee Fair: 1,423,264 | Edward J. Hummel: 1,480,399 | |
| 1942 | John E. Sweeney: 738,175 | Edward J. Hummel: 926,523 | |
| 1940 | John E. Sweeney: 1,562,021 | Edward J. Hummel: 1,453,513 | |
| 1940 | George M. Neffiner: 293,766 | ||
| 1922 | William D. Fulton : 685,818 | Thad H. Brown : 820,974 | |
| 1920 | William D. Fulton : 749,566 | Harvey C. Smith : 1,134,657 | George Markert : 43,467 Jasper Shuman : 1,525 |
| 1918 | William D. Fulton : 432,422 | Harvey C. Smith : 471,228 | |
| 1916 | William D. Fulton : 564,509 | Charles Q. Hildebrant : 543,873 | M. J. Beery : 38,136 Seymour E. Fox : 6,837 |
| 1914 | J. H. Secrest : 451,131 | Charles Q. Hildebrant : 488,010 | Frank W. Woods : 53,808 Nathan Wycoff : 53,575 |
| 1912 | Charles H. Graves :432,082 | Thomas L. Lewis : 283,767 | John L. Sullivan : 208,458 Edward S. Smith : 88,914 Addison Taylor : 12,028 William R. Fox : 2,767 |
| 1910 | Charles H. Graves : 423,580 | Granville W. Mooney : 405,375 | Edward Hasenauer : 61,656 Alfred H. Stratton : 7,104 William R. Fox : 2,881 |
| 1908 | J. H. Newman : 518,225 | Carmi Thompson :556,073 | Arthur B. Hollenbaugh : 31,681 Henry J. Haskel : 10,615 Albert Boswell : 509 Timothy Crabtree : 150 James Rugg : 845 |
| 1906 | Samuel A. Hoskins : 351,676 | Carmi Thompson : 408,066 | Olly J. Henslee : 18,432 Alfred F. Hughes : 11,970 Max Eisenberg : 2,211 |
| 1904 | Alfred P. Sandles : 357,179 | Lewis C. Laylin : 587,568 | Harold King Rockhill : 19,253 Alfred J. Swing : 33,763 John H T Juergens : 2,534 John E. Allen : 1,093 |
| 1902 | Herbert S. Bigelow : 345,706 | Lewis C. Laylin : 436,171 | Andrew L. White : 12,336 Max S. Hayes : 14,359 Theodore Adams : 2,983 |
| 1900 | Henry H. McFadden : 474,078 | Lewis C. Laylin : 543,389 | Frank Frankenberg : 4,647 J. Knox Montgomery : 9,983 Samuel Borton : 1,707 Louis F. Hemse : 4,650 |
| 1898 | Upton K. Guthrey : 347,074 | Charles Kinney : 408,213 | Thomas Brown : 7,689 John F. Flynn : 5,793 John A. Graft : 10,911 |
| 1896 | Chilton A. White 473,462 | Charles Kinney 525,000 | Samuel H Rockhill 5,469 Wesley C. Bates 3,382 Daniel W. Wallace 1,234 |
| 1894 | Milton Turner 276,902 | Samuel M. Taylor 413,988 | Charles R. Martin 49,495 Mark G. McCaslin 23,273 |
| 1892 | William A. Taylor 401,451 | Samuel M. Taylor 402,540 | |
| 1890 | Thaddeus E. Cromley 352,579 | Daniel J. Ryan 363,548 | Melanathon C. Lockwood 23,837 Ezekial T. Curtis 1,752 |
| 1888 | Boston G. Young 395,522 | Daniel J. Ryan 416,510 | Walter S. Payne 24,618 George F Ebner 3,452 |
| 1886 | John McBride 329,314 | James S. Robinson 341,095 | Henry R. Smith 28,982 Charles Bonsall 2,010 |
| 1884 | James W. Newman 380,355 | James S. Robinson 391,597 | Evan J. Morris 8,607 Peter M. Harrold 3,475 |
| 1882 | James W. Newman 316,874 | Charles Townsend 279,759 | Ferdinand Schumacher 12,202 George L. Hafer 5,345 |
| 1880 | William Lang 343,016 | Charles Townsend 362,021 | Charles A. Lloyd 6,786 William A. Doan 2,815 |
| 1878 | David R. Paige 270,966 | Milton Barnes 274,120 | Andrew Roy 38,332 Jeremiah N. Robinson 5,682 |
| 1876 | William Bell, Jr. 311,220 | Milton Barnes 317,856 | Edward S. Chapman 1,863 |
| 1874 | William Bell, Jr. 238,406 | Allen T. Wikoff 221,204 | John R. Buchtel 7,815 |
| 1872 | Aquila Wiley 251,778 | Allen T. Wikoff 265,925 | Ferdinand Schumacher 2,035 |
| 1870 | William Heisley 205,014 | Isaac R. Sherwood 221,709 | Jay Odell 2,862 |
| 1868 | Thomas Hubbard 249,681 | Isaac R. Sherwood 267,065 | |
| 1866 | Benjamin Le Fevre 213,606 | William H. Smith 256,302 | |
| 1864 | William W. Armstrong 183,842 | William H. Smith 238,145 | |
| 1862 | William W. Armstrong 184,315 | Wilson S. Kennon 178,755 | |
| 1861 | William W. Armstrong 151,912 | Benjamin Rush Cowen 207,352 | |
| 1859 | Jacob Reinhard 170,400 | Addison P. Russell 184,839 | |
| 1857 | Jacob Reinhard 158,832 | Addison P. Russell 160,638 | |
| 1855 | William Trevitt 133,641 | James H. Baker 168,724 | |
| 1853 | William Trevitt : 151,818 | William Graham : 33,518 | Nelson H. Van Vorhes : 97,500 |
| 1851 | William Trevitt : 145,636 | Henry W. King : 15,768 | Earl Bill : 120,256 |