1. The Battle of Rattle Run took place on April 19, 1814, during the War of 1812. Ohio militia and Native American allies defeat British forces in a skirmish along the Rattle Run Creek in the northwest corner of Ohio.

2. On April 19, 1869, the Cleveland Printing and Publishing Company prints the first issue of the Cleveland Daily Herald newspaper. The paper would later merge with the Cleveland Plain Dealer to become the largest newspaper in Ohio.

3. The Ohio State University College of Dentistry was founded on April 19, 1891. It is the fourth oldest dental school in the United States.

4. Hiram College in Hiram, Ohio, was founded on April 19, 1850. The liberal arts college is known for its emphasis on leadership and community service.

5. The Ohio Women's Bar Association was established on April 19, 1920. It is the first organization in Ohio dedicated to advancing the interests and opportunities of women in the legal profession.