<page_title> List of lieutenant governors of Ontario </page_title> <section_title> Lieutenant Governors of Ontario, 1867–present </section_title> <table> <cell> 19 <col_header> # </col_header> </cell> <cell> John Keiller MacKay PC OC DSO VD QC <col_header> Name </col_header> </cell> <cell> 1957 <col_header> Governor from </col_header> </cell> <cell> 1963 <col_header> Governor until </col_header> </cell> </table>
MacKay served as the 19th Lieutenant Governor of Ontario from 1957 to 1963.