Statistical Tables for Amendments Proposed and Adopted
These tables are updated versions of tables contained in "The Ohio State Constitution, A Reference Guide", Steven H. Steinglass & Gino J. Scarselli , KFO401 1851 .A6 S74 2004
Amendments Proposed and Adopted in 1912, pre and post 1912
| Proposed | Adopted | % Approved | Amendments per year | |
| 1852-1911 | 40* | 11 | 27.5 | 0.18 |
| 1912 | 42 | 34 | 81.0 | 34.0 |
| 1913-2007 | 207 | 112 | 54.1 | 1.2 |
*This includes the three proposed amendments submitted separately to the voters in 1874 and rejected by them along with the proposed Constitution of 1874.
Amendments Proposed by General Assembly (“GA”) and Initiative and Adopted 1913-2002
| Decade | GA | GA Pass | GA Fail | Initiative | Initiative Pass | Initiative Fail | Total | Pass | Fail |
| 1913-1919 | 7 | 2 | 5 | 14 | 4 | 10 | 21 | 6 | 15 |
| 1920s | 11 | 4 | 7 | 5 | 0 | 5 | 16 | 4 | 12 |
| 1930s | 5 | 3 | 2 | 8 | 3 | 5 | 13 | 6 | 7 |
| 1940s | 7 | 6 | 1 | 2 | 2 | 0 | 9 | 8 | 1 |
| 1950s | 23 | 18 | 5 | 1 | 0 | 1 | 24 | 18 | 6 |
| 1960s | 22 | 16 | 6 | 1 | 0 | 1 | 23 | 16 | 7 |
| 1970s | 42 | 28 | 14 | 11 | 1 | 10 | 53 | 29 | 24 |
| 1980s | 11 | 6 | 5 | 7 | 0 | 7 | 18 | 6 | 12 |
| 1990s | 11 | 10 | 1 | 6 | 4 | 2 | 17 | 14 | 3 |
| 2000-07 | 3 | 2 | 1 | 9 | 3 | 6 | 12 | 5 | 7 |
| Total | 143 | 95 | 48 | 64 | 17 | 47 | 207 | 112 | 95 |