Any One vs. Anyone
“Anyone” is one word when it means any person. “Any one” is written as two words when the construction refers to a single member of a larger set, including the common pattern “any one of …”.
Use “anyone” for any person; use “any one” for any single member of a set.
Key details
Choose the right form
| Meaning | Form | Example |
|---|---|---|
| Any person | anyone | Anyone can apply. |
| Any single member of a set | any one | Choose any one of the three options. |
| Emphatic selection from a group | any one | Any one of these keys could fit. |
Quick tests
Substitution test
Could you replace the word with “any person”?
If yes: Use “anyone.”
If no: If you mean one particular member from a set, use “any one.”
Caveat: The distinction is semantic, not merely stylistic spacing.
Examples
Anyone with a ticket may enter.
The one-word pronoun means any person.
You may choose any one of the available dates.
Two words identify a single member of a set.
Further guidance
Core difference
“Anyone” is a one-word pronoun meaning any person; “any one” is two words when “one” is a separate noun or pronoun, as in “any one of the options.”
Usage Boundary
Use “anyone” for an unspecified person. Use “any one” when choosing or identifying a single member from a set.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- anyone — American Heritage Dictionary (opens in a new tab)American Heritage Dictionary · Anyone as one word for any person and any one as two words before of