 As of 30 November 2010, it had a population of 3,137 and an area of .The municipality of St Martin in Passeier contains the "frazioni" (subdivisions, mainly villages and hamlets) Saltaus (Saltusio), Quellenhof (Sorgente), Ried (Novale), Kalmtal (Valclava), Christl (Cresta), Flon (Vallone), and Matatz (Montaccio),

St Martin in Passeier borders the following municipalities