Martna () was a rural municipality of Estonia, in Lääne County. It had a population of 760 (2016) and an area of 269 kmò.
Martna Parish had 33 villages:
Allikotsa, Ehmja, Enivere, Jõesse, Kaare, Kaasiku, Kabeli, Kasari, Keravere, Keskküla, Keskvere, Kesu, Kirna, Kokre, Kurevere, Laiküla, Liivaküla, Martna, Männiku, Niinja, Nõmme, Ohtla, Oonga, Putkaste, Rannajõe, Rõude, Soo-otsa, Suure-Lähtru, Tammiku, Tuka, Uusküla, Väike-Lähtru, Vanaküla.