John Marcus O'Sullivan was an Irish Fine Gael politician who served as Minister for Education from 1926 to 1932 and Parliamentary Secretary to the Minister for Finance from 1924 to 1926. He served as a Teachta Dála (TD) from 1923 to 1943.

The Minister for Education is a senior minister in the Government of Ireland and leads the Department of Education. The current Minister for Education is Norma Foley, TD.