Falasarna or Phalasarna is an ancient Greek harbor town on the northwest coast of Crete. The currently visible remains of the city were built around 333 BC, and include several imposing sandstone towers and bastions.

The harbor is ringed by stone quays with mooring stones, and connected to the sea through two artificial channels. Notable finds in the harbor area include public roads, wells, warehouses, an altar, and baths. Most of these structures were revealed by excavations that began in 1986.

The acropolis is built on a cape that rises 90 meters above the harbor and juts into the sea. The acropolis has many remains, including a temple dedicated to goddess Dictynna, fortification towers, cisterns, wells, and watchtowers that could have been used to guard sea routes.

Today Phalasarna is an agricultural area and tourist attraction.

The valley is filled with olive groves and greenhouses cultivating mainly tomatoes; there are also scattered family-run hotels and restaurants. The seaside has long sandy beaches and crystal clear waters that are popular both with residents of the province of Chania and visitors from Greece and abroad. Falasarna beach was voted, in the CNN poll, among the best 100 beaches of the world