Lentiai is a comune (municipality) in the province of Belluno in the Italian region of Veneto, located about northwest of Venice and about southwest of Belluno. As of 31 December 2004, it had a population of 3,020 and an area of .
Lentiai borders the following municipalities: Cesiomaggiore, Feltre, Mel, Santa Giustina, Valdobbiadene, Vas.