From Ohio History Central
The convention adjourned its proceedings on March 10, 1851. Seventy-nine delegates voted in favor of the constitution, while fourteen opposed it. The people in opposition primarily belonged to the Whig Party and the Free Soil Party. To go into effect, Ohio voters had to approve the constitution. They did so overwhelmingly on June 17, 1851. Although numerous amendments have been made over the years, the Constitution of 1851 remains the fundamental law of Ohio.