Mareno di Piave is a comune (municipality) in the Province of Treviso in the Italian region Veneto, located about north of Venice and about northeast of Treviso.
Mareno di Piave borders the following municipalities: Cimadolmo, Codogné, Conegliano, San Vendemiano, Santa Lucia di Piave, Spresiano, Vazzola.
As of 31 December 2004, Mareno di Piave had a population of 8,583 and an area of .
The following graph shows the changes in the municipality's population over time.