The 52nd Battalion (New Ontario), CEF, was an infantry battalion of the Canadian Expeditionary Force during the Great War.

It disembarked in France on 21 February 1916, where it fought as part of the 9th Canadian Brigade, 3rd Canadian Division in France and Flanders until the end of the war.

[1][2] The 52nd Battalion recruited in Port Arthur, Kenora, Fort Frances and Dryden, Ontario and was mobilized at Port Arthur.

Captain Christopher O'Kelly was awarded the Victoria Cross for his actions on 26 October 1917 at Passchendaele, Belgium.

[4][3] The 52nd Battalion was awarded the following battle honours: The 52nd Battalion (New Ontario), CEF, is perpetuated by The Lake Superior Scottish Regiment.