Ageha (揚羽) is a Japanese word meaning "swallowtail butterfly". It is Taira clan's Mon.

Ageha may also refer to:

• Ageha Ohkawa (born 1967), Japanese manga artist
• Ageha Tanigawa (born 2003), Japanese swimmer

• Ageha, the central character in the 1996 Japanese film Swallowtail Butterfly (film)
• Ageha, a character in the 2002 video game Shinobi (2002 video game)
• Ageha, a character in the video game Shinobido: Way of the Ninja
• Ageha, a character in the manga series Basara (manga)
• Ageha, the main character of the manga series Papillon (manga)
• Ageha, a character in the manga and anime series GetBackers
• Ageha, a character in the anime and manga series Omamori Himari; see List of Omamori Himari characters
• Ageha Hijiri, a main character from Soaring Sky! Pretty Cure
• Ageha Himegi, a character in the visual novel, If My Heart Had Wings; see If My Heart Had Wings (visual novel)
• Ageha Kuki, a character in the visual novel and anime Maji de Watashi ni Koi Shinasai!
• Ageha Kurono, a character in the anime and manga series Rosario + Vampire; see List of Rosario + Vampire characters
• Ageha Squad, a fictitious unit in the anime series Eureka Seven; see List of Eureka Seven characters
• Ageha Yoshina, the main protagonist in the manga series Psyren
• Ageha, a character in the video game series Pop'n Music

• "Ageha", a song by a Japanese rock group Tourbillon (band)
• "Ageha", a song by a Japanese singer Harumi Tsuyuzaki (also known as Lyrico)
• "Ageha", a song by a Japanese rock group Going Under Ground
• "Ageha", a song by a Japanese pop band Core of Soul
• Ageha (album), an album by a Japanese group w-inds
• Ageha, an album by a Japanese singer Yozuca
• "Ageha", a song by a Japanese rock group Mucc
• "AGEHA", a song by Ryutaro Nakahara in the game Beatmania IIDX 11 IIDXRED
• "AGEHA", a song by the Generations from Exile Tribe
• "Ageha {Prototype Edition}", an EP by Dr. Carmilla

• ageHa, a weekend club event at the Usen Studio Coast event space in Tokyo, Japan
• Koakuma Ageha, a fashion magazine dedicated to "gyaru" and hostess styles