Usagi may refer to:
- Usagi, a Japanese term for rabbit
- Usagi, a Japanese unisex given name meaning rabbit
- Hana Usagi, a manga series by KentarÅ Kobayashi
- Samurai Usagi, a manga series by Teppei Fukushima
- Usagi Drop or Bunny Drop, a manga series by Yumi Unita
- Usagi Yojimbo, a comic book series by Stan Sakai
- Miyamoto Usagi, the main character in Usagi Yojimbo media
- Usagi Tsukino or Sailor Moon, the main character in Sailor Moon media
- Usagi "Chibiusa" Tsukino or Chibiusa, a character in Sailor Moon media