Trinity Grammar School

Trinity Grammar School may refer to:

In Australia:
 * Trinity Grammar School (Victoria) located in the Melbourne suburb of Kew, Victoria
 * Trinity Grammar School (New South Wales) located in the Sydney suburb of Summer Hill, New South Wales
 * Trinity Grammar School Preparatory School located in the Sydney suburb of Strathfield, New South Wales

In the United Kingdom:
 * Woodside High School, Wood Green, formerly known as Trinity Grammar School