Colonel Gray Sr. High School (CGHS), colloquially referred to as "The Gray", is a Canadian secondary school in Charlottetown, Prince Edward Island. Its zone includes students from the central parts of Queens County, in the City of Charlottetown.

The school is administratively part of the Public Schools Branch. Its official colours are Burgundy and Gray and the mascot is a Colonel. The sports teams from "The Gray" are called the Colonel Gray Colonels.