Olof Persson, sometimes Petersson (January 6, 1493 – April 19, 1552), better known under the Latin form of his name, Olaus Petri (or less commonly, Olavus Petri), is a clergyman, writer, judge and major contributor to the Protestant Reformation in Sweden.

His brother, Laurentius Petri (Lars Persson), becomes the first Evangelical Lutheran Archbishop of Sweden.