Matthias of Trakai or of Vilnius (Lithuanian: Motiejus Trakiškis; Latin: Matthias Vilnensis; ca. 1370 – 9 May 1453 in Vilnius) was a Lithuanian Roman Catholic clergyman, the first Bishop of Samogitia from its establishment in 1417 until 1422 and the fifth Bishop of Vilnius from 4 May 1422 until 9 May 1453 and an ex officio member of the Council of Lords.