Martynas is a Lithuanian masculine given name. It is a cognate of the English language name Martin.

List of people named as

• Martynas Varnas (born 1997)

Lithuanian professional basketball player

• Martynas Andriukaitis (1981–2014), Lithuanian professional basketball player
• Martynas Andriuškevičius (born 1986), Lithuanian professional basketball player
• Martynas Gecevičius (born 1988), Lithuanian professional basketball player currently playing for BC Lietuvos Rytas
• Martynas Goštautas (1428–1483), nobleman from the Grand Duchy of Lithuania of Goštautai family
• Martynas Jankus (1858–1946), social activist and publisher in East Prussia
• Martynas Jurgilas (born 1988), track and field sprint athlete who competes internationally for Lithuania
• Martynas Knakfusas or Marcin Knackfus (1742–1821), Polish–Lithuanian Neoclassical architect of German descent
• Martynas Mažeika (born 1985), Lithuanian professional basketball player
• Martynas Mažvydas (1510–1563), author and the editor of the first printed book in the Lithuanian language
• Martynas Pocius (born 1986), Lithuanian professional basketball player
• Martynas Počobutas or Marcin Odlanicki Poczobutt (1728–1810), Polish–Lithuanian Jesuit astronomer and mathematician
• Martynas Švėgžda von Bekker (born 1967), Lithuanian violinist
• Simonas Martynas Kosakovskis or Szymon Marcin Kossakowski (1741–1794), Polish-Lithuanian nobleman