Inaba (written: 稲葉 or 因幡) is a Japanese surname. Notable people with the surname include:
- Akira Inaba (稲葉 陽, born 1988), Japanese shogi player
- Atsuko Inaba (稲葉 貴子, born 1974), Japanese singer
- Atsunori Inaba (稲葉 篤紀, born 1972), Japanese baseball player
- Atsushi Inaba (稲葉 敦志, born 1971), Japanese video game producer and designer
- Carrie Ann Inaba (born 1968), American dancer, choreographer, actress, television host, and singer
- Daiki Inaba (稲葉 大樹, born 1988), Japanese professional wrestler
- Darryl S. Inaba (born 1946), American pharmacologist
- Hideaki Inaba (因幡 英昭, born 1944), Japanese powerlifter
- Hiroshi Inaba (稲葉 博志, born 1948), Japanese bobsledder
- Hisahito Inaba (稲葉 久人, born 1985), Japanese footballer
- Ian Inaba, (born 1971), American film and music video director, producer, and journalist
- Kayo Inaba (稲葉 カヨ), Japanese biologist
- Kazuyo Inaba (稲葉 和世, born 1959), Japanese swimmer
- Kosaku Inaba (稲葉 興作, 1924–2006), Singapore-born Japanese businessman
- Koshi Inaba (稲葉 浩志, born 1964), Japanese vocalist
- Kotaro Inaba (稲葉 洸太郎, born 1982), Japanese futsal player
- Inaba Masaaki (稲葉 正明, 1723–1793), Japanese daimyō
- Inaba Masakatsu (稲葉 正勝, 1597–1634), Japanese daimyō
- Inaba Masakuni (稲葉 正邦, 1834–1898), Japanese daimyō
- Inaba Masami (稲葉 正巳, 1815–1879), Japanese daimyō
- Inaba Masamori (稲葉 正盛, 1791–1820), Japanese daimyō
- Inaba Masanobu (稲葉 正謖, 1749–1806), Japanese daimyō
- Inaba Masao (稲葉 正夫, 1908–1973), Japanese military officer
- Inaba Masanori (稲葉 正則, 1623–1696), Japanese daimyō
- Inaba Masatake (稲葉 正武, 1769–1840), Japanese daimyō
- Inaba Masayasu (稲葉 正休, 1640–1684), Japanese daimyō
- Inaba Masayoshi (稲葉 正善, 1848–1902), Japanese daimyō
- Mayumi Inaba (稲葉 真弓, 1950–2014), Japanese writer and poet
- Minoru Inaba (稲葉 実, born 1951), Japanese voice actor
- Yamato Inaba (稲葉 大和, born 1943), Japanese politician
- Yasuhiro Inaba (稲葉 泰弘, born 1985), Japanese sport wrestler
- Inaba Yoshimichi (稲葉 良通, 1515–1589), Japanese samurai
- Yoshio Inaba (稲葉 義男, 1920–1998), Japanese actor
- Yu Inaba (稲葉 友, born 1993), Japanese actor