Whose or who's: which is correct?

Correct
whose (possessive) / who's (who is, who has)
Avoid
who's (as the possessive: "who's bag is this")
Avoid
whose (for "who is")
Summary

Correct: whose (possessive) / who's (who is, who has) — Avoid: who's (as the possessive: "who's bag is this") / whose (for "who is"). Whose = belonging to whom; who's = the contraction of who is or who has.

Part of speech
determiner / contraction
Source
Oxford

Why

Oxford: whose is the possessive form of who and, like its, takes no apostrophe; who's is only ever a contraction. If "who is" or "who has" fits, write who's.

Examples

  • Whose bag is this?
  • Who's coming to the meeting?
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Checked against
Merriam-Webster / Oxford
Spelling authority
Merriam-Webster · Oxford English Dictionary / Oxford spelling · SCOWL
Commonly confused and non-standard forms
64
Dictionary
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