HH9 or HH-9 may refer to:
Ashes of Victory, the ninth novel in the Honor Harrington series by David Weber, abbreviated HH9 HH9, an album by Henrik Nordvargr Björkk; see Nordvargr discography HH9, one of the Hamburger–Hamilton stages in chick development HH9, one of the hammerhead ribozymes Nasal embryonic LHRH factor (HH9) (pennant: HH9), a WWII-era German fishing boat
See also
H9 (disambiguation)