Usagi may refer to:

• Usagi, a Japanese term meaning rabbit
• Typhoon Usagi (disambiguation), one of several named tropical storms
• Usagi, a Japanese unisex name/unisex given name, used by
  • Usagi Tsukino or Sailor Moon, the main character in Sailor Moon
  • Usagi "Chibiusa" Tsukino or Chibiusa, a character in Sailor Moon
  • Miyamoto Usagi, the main character in Usagi Yojimbo
  • Kuro Usagi, also called Black Rabbit, one of the main characters from "Mondaiji tachi ga isekai kara kuru sou desu yo?" (Problem Children Are Coming from Another World, Aren't They?) or short "Mondaiji tachi" series
  • Usagi Aloha'oe, a main protagonist of the ninth part of the JoJo's Bizarre Adventure series, The JOJOLands
• Usagi, a Japanese warabe uta
• Name of several manga/comic series, including
  • Hana Usagi, a manga series by Kentarō 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