St. Thomas' Girls' High School is a girls' school in Sri Lanka's southernmost district Matara.

[2] They were followed by Mrs. De Silva and Mrs. Bultjens.

The school started at a rented house on Main Street, Matara.

It was moved to its present location in Walpola in 1950.

In 2009, one student died in hospital and 27 others were treated in hospital after they had received a rubella vaccination in the school.