Number nine may refer to:

• 9 (number), natural number
• Number Nine, Arkansas, a community in the United States
• Number Nine (novel), a 1951 novel by A.P. Herbert
• Number Nine (album), by Chris Hülsbeck
• No. 9 (album), by Wende (2009)
• Number 9 Audio Group, a recording studio located in Toronto, Ontario, Canada
• Number Nine Visual Technology, a computer hardware manufacturer whose primary business was video cards
• New Mexico No. 9, or No. 9, a chile pepper cultivar
• #9, the flagship beer of Magic Hat Brewing Company
• Number nine, repeated phrase on the Beatles recorded composition "Revolution 9"
• "Number 9", a song by Korean Girl Group T-ara on their EP Again
• Number (N)ine, a Japanese fashion brand found in Tokyo in 1996
• Number Nine, assistant to Jenny Jump in the Oz books by John R. Neill
• Number 9, the shirt number often worn by an association football team's centre forward
• Gordie Howe (1928-2016), Detroit Red Wings hockey player, frequently referred to by his sweater number, number 9
• Bobby Hull (born 1939), Chicago Black Hawks hockey player, frequently referred to by his sweater number, number 9
• Maurice Richard (1921-2000), Canadiens hockey player, frequently referred to by his sweater number, number 9
• False 9 or False Number 9, a term used to describe an unconventional association football lone striker or centre-forward, who drops deep into midfield

See also

• 9 (disambiguation)