Humorous is correct worldwide. http://en.wikipedia.org/wiki/Wikipedia_talk:Typo#Dictionary.com
Humourous is in common usage in Commonwealth countries.
- I do not believe this to be true. Cite please? --18.104.22.168 22:10, 21 April 2009 (UTC)
- I don't believe it either; I don't think I've ever seen it here in the UK, and it isn't in the Chambers or Collins dictionaries. It appears to be an obsolete spelling, though:  Equinox ◑ 22:13, 21 April 2009 (UTC)
- While I have no citation, I definitely have the opinion that this spelling is in common usage today in the UK. Perhaps less common than humorous, but far from obsolete. A quick google search, for example, on guardian.co.uk, telegraph.co.uk or timesonline.co.uk shows many instances of its use. --David Edgar 15:19, 9 September 2009 (UTC)
- I feel strongly that it is not a common UK usage: more of a common UK mistake, really. ODWE actually says don't use this spelling, in its entry for humorous. Best wishes DisillusionedBitterAndKnackered 17:47, 15 October 2009 (UTC)
- The spelling is mentioned in the OED with a couple of cites from the early 1800s, but it is not currently common in the UK, nor is Shakespeare's spelling: "humerous", but even that is occasionally seen in those newspapers' blogs. Dbfirs 20:26, 13 August 2011 (UTC)