Loreto Grammar School is a convent grammar school for girls in Omagh, County Tyrone, Northern Ireland.

The teaching age range is 11–18 It is a Roman Catholic school, founded in 1855, and is now under the trusteeship of the Loreto Education Trust.

In 2018, 99.2% of its entrants achieved five or more GCSEs at grades A* to C, including the core subjects English and Maths, and the school was ranked 12th out of 191 schools in Northern Ireland.

[1] Also in 2018, 81.8% of its entrants to the A-level exam achieved A*-C grades.

[2]