Trzcianne (Yidish: טרעסטיני, Trestiny) is a village in eastern Poland, in the Podlachian Voivodeship, in the Powiat of Mońki. It is the seat of the Trzcianne Commune. The population of Trzcianne is ca. 610 people and the population of the gmina is 4 737 people. The Trzcianne Gmina is located in the outskirts of the Biebrza National Park.