Trinity High School is an interparochial school for children of the Whitesville and Knottsville areas in East Daviess County.  St. Mary’s High School had been in operation since the early part of the 20 century.  In 1967, due to declining enrollment and an effort to improve the curriculum, St. William’s High School closed and the three parishes, St. William, St. Lawrence and St. Mary of the Woods consolidated and became Trinity High School.

The school is an integral part of east Daviess County and often the focal point of community activities.  Trinity offers a college prep program as well as a basic diploma.  Roughly 90 percent of graduates pursue higher education, vocational training, or join a branch of the military.  Opportunities for students include inter-mural athletics, leadership activities, service projects, practical life training, and clubs.  Several clubs are very active including the Agricultural Club, Y Leadership Club, Environmental Club, Spanish Club, and Students Against Destructive Decisions.  There are also active members of the National Honor Society and National Student Council and many students are involved in these groups.

Over the past five years Trinity boasts a 99.8 percent graduation rate.  The school has made considerable effort to strengthen its staff and become much more efficient in using the funds made available to it.  Trinity High School is small, solid, and successful.  The staff looks forward to offering a faith-filled academic education to the youth of Eastern Daviess, Southern Hancock, and Western Ohio counties for many years to come.