Amanchu! (あまんちゅ！) is a Japanese manga series written and illustrated by Kozue Amano, which began serialization in Mag Garden's Monthly Comic Blade magazine from November 2008. An anime television series adaptation by J.C.Staff aired in Japan between July and September 2016. The second season of the anime series aired between 7 April 2018 and 23 June 2018.

The manga ended on 10 May 2021 and shipped its final volume in November 2021.The title Amanchu! appears to be a combination of ama (海人 (male) or 海女 (female), "diver"), and -nchu (人), an Okinawan suffix that means "person" or "people", for example as in Uchinānchu (沖縄人, "Okinawan").