Senator O'Connor College School (also called SOCS, Senator O'Connor CS, Senator O'Connor, OCS, or simply Senator or O'Connor), previously known as John J. Lynch High School until 1967 is a Separate high school in the Parkwoods neighbourhood in the North York district of Toronto, Ontario, Canada serving grades 9 to 12 in the communities of Wexford, Maryvale, Don Mills, and Dorset Park.

The school was named after Senator Frank O'Connor, founder of the Laura Secord chocolate company. The school is part of the Toronto Catholic District School Board and was originally founded as John J. Lynch High School in 1963, named after the first archbishop of Toronto from 1870 to 1888, John Joseph Lynch. It had 1,414 students as of March 2018, and was ranked 266 of 738 secondary schools in the 2017-18 Fraser Institute School Report Card.