Number nine may refer to:
- 9 (number), natural number
- Number Nine (album) by Chris Hülsbeck
- 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
- Number nine, repeated phrase on the Beatles recorded composition Revolution 9, famously said to contain a backmasked message
- Number Nine, assistant to Jenny Jump in the Oz books by John R. Neill
Famous quotes containing the word number:
“Love has its name borrowed by a great number of dealings and affairs that are attributed to it—in which it has no greater part than the Doge in what is done at Venice.”
—François, Duc De La Rochefoucauld (1613–1680)