Welcome to the website of St. Theresa's Roman Catholic Parish. We are situated in the beautiful village of Sion Mills which is in County Tyrone in the northwest of Ireland. We are a part of the Diocese of Derry. The aim of our website is to let the world know about us and we would hope to reach those people who have left the Sion Mills area for all corners of the world, and who still like to keep in touch with home. We will tell of our parish and church history, our patron, St. Theresa, our church services, parish and local news as well as links to the schools in the parish. We will also have some pictures and a guestbook where visitors can leave their comments and messages. We welcome you to St. Theresa's and invite you to browse through our site. Enjoy your visit and while you are here please sign our guestbook.