Matsunaga (松永) is a Japanese surname. Notable people called Matsunaga include:
Enzo Matsunaga, an authorFutoshi Matsunaga, a Japanese serial killerMatsunaga Hisahide, a Daimyo (feudal lord)Masahiro Matsunaga, a race car driverSpark Matsunaga, a United States SenatorYoshisuke Matsunaga, a Japanese mathematician of the 18th centuryDaniel Matsunaga, a Japanese-Brazilian model, actor and football player currently based in the PhilippinesFictional Characters
Mikage Matsunaga, a fictional character from anime and manga series Miracle GirlsTomomi Matsunaga, a fictional character from anime and manga series Miracle Girls