Whose vs Who's: What Is the Difference?
Who's is a contraction of who is or who has. Whose is possessive: it asks or tells who something belongs to. Who's coming? Whose coat is this?
Updated 21 October 2026 · EssayWriting.com editorial team
- Who's means who is or who has.
- Whose shows possession and can refer to people or things.
- Expand the word: if who is or who has works, use who's.
Whose vs who's: the difference at a glance
| Word | What it is | Means | Example |
|---|---|---|---|
| who's | contraction | who is / who has | Who's ready? Who's seen my notes? |
| whose | possessive (question or relative) | belonging to whom / which | Whose essay won? The author whose book I cited. |
How to use who's
Use who's only when who is or who has fits.
- Who's responsible for the bibliography? (who is)
- Who's finished the reading? (who has)
- She is the tutor who's helping me with my thesis. (who is)
How to use whose
Use whose in questions about ownership and to link a noun to the person or thing it belongs to.
- Whose argument is more convincing?
- Darwin, whose theory changed biology, published in 1859.
- A study whose sample was small should be read cautiously.
Yes, whose can refer to things, not just people: "a city whose streets flood" is standard English.
How to remember the difference
Expand it: if who is or who has works, write who's. Otherwise write whose. It follows the same logic as its vs it's: possessive pronouns never take apostrophes.
Tricky cases and exceptions
Whose for objects. Some writers avoid "whose" for things and write "of which" instead ("a city the streets of which flood"), but this is clumsy and unnecessary. Who's vs whose in relative clauses: "the student who's leading" (who is leading) vs "the student whose group is leading".
Whose vs who's in academic writing
In formal essays avoid contractions, so write who is in full. Whose is common and useful for adding context to sources: "Smith, whose 2020 survey covered 4,000 students, found…".
Practice quiz
Choose the correct option, then open each answer to check your reasoning.
1. ___ turn is it to present? (Whose / Who's)
Whose: the turn belongs to someone.
2. ___ going to the library? (Whose / Who's)
Who's: who is going.
3. The researcher ___ data was questioned resigned. (whose / who's)
whose: possession.
4. ___ read the assigned chapter? (Whose / Who's)
Who's: who has read.
Related guides
Frequently asked questions
Is it whose or who's for possession?
Whose. Who's always means who is or who has.
Can whose refer to things?
Yes. "A theory whose predictions failed" is correct.
Is who'se a word?
No.
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