Hoshina (written: 保科) is a Japanese surname. Notable people with the surname include:
Hoshina Masaari (保科 正益) (1833–1888), Japanese daimyō
Hoshina Masakage (保科 正景) (1616–1700), Japanese daimyō
Hoshina Masamitsu (保科 正光) (1561–1631), Japanese daimyō
Hoshina Masanao (保科 正直) (1542–1601), Japanese daimyō
Hoshina Masasada (保科 正貞) (1588–1661), Japanese daimyō
Hoshina Masatoshi (保科 正俊) (1509–1593), Japanese samurai
Hoshina Masayuki (保科 正之) (1611–1673), Japanese daimyō
Tomohiko Hoshina (智彦 保科) (born 1987), Filipino-Japanese judoka
Fictional characters:
Utau Hoshina (ほしな 歌唄), character in the manga series Shugo Chara!