Mugen is a word of Japanese origin, meaning dream, fantasy (夢幻), or infinite (無限).

It may also refer to:

  • "Mugen" (song), a song by Nana Mizuki
  • Mugen Imawano, a character from the Capcom fighting game series Rival Schools
  • Mugen Motorsports (無限)
  • Mugen no juunin (無限の住人), Manga known in English as Blade of the Immortal
  • M.U.G.E.N, a fighting game engine
  • Mugen, a character in the Japanese Anime series Samurai Champloo
  • Mugen Seiki (無限精機), a Japanese radio-controlled car manufacturer
  • Mugen (town) (木根镇), in Guiping, Guangxi, China
  • Mugen Tenshin, a fighting style in the Dead or Alive series
  • Mugen Liger, a pilotable living battle machine in the Zoids anime/game series.
  • Mugen Power, a brand of extended batteries for handsets, Pocket Wi-Fi and laptops.