Harbor vs. Harbour
“Harbor” is the US spelling and “harbour” is the UK spelling of the same noun and verb. Use the spelling expected by the regional variety or editorial style you are following. The noun and verb meanings remain the same across the two regional spellings.
“Harbor” is the US spelling and “harbour” is the UK spelling of the same noun and verb. Use the spelling expected by the regional variety or editorial style you are following.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| US spelling of the noun and verb | harbor | Use “harbor” in US English or a house style that selects US spelling. |
| UK spelling of the same noun and verb | harbour | Use “harbour” in UK English or a house style that selects UK spelling. |
| official name or quotation | preserve source spelling | Keep the established spelling of a proper name or quoted text. |
Quick tests
Meaning / construction test
Are you following US spelling conventions?
If yes: Use “harbor.”
If no: Use “harbour” under UK spelling, while preserving official names and quotations as written.
Caveat: The spellings share the same core meanings; this is a regional/editorial spelling choice, not a semantic distinction.
Examples
The ship entered the harbor before sunset.
“Harbor” is the US spelling.
The ship entered the harbour before sunset.
“Harbour” is the UK spelling.
The official place name keeps its established spelling.
Proper names can override a general house preference.
Further guidance
Core difference
“Harbor” is the US spelling and “harbour” is the UK spelling of the same noun and verb. Use the spelling expected by the regional variety or editorial style you are following.
Fast Test
Choose by meaning, grammatical function, and documented regional convention rather than treating every visible variant as an error.
Variant Boundary
The noun and verb meanings remain the same across the two regional spellings.
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.
- HARBOR — Cambridge Dictionary (opens in a new tab)Cambridge University Press · US spelling “harbor” and cross-reference to UK “harbour”
- HARBOUR — Cambridge Dictionary (opens in a new tab)Cambridge University Press · UK spelling “harbour” and cross-reference to US “harbor”