ZIP Codes in Fort Collins, CO
Fort Collins uses 5 ZIP codes, all in Larimer County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 5 Fort Collins ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 80521 | standard | Larimer | 38,776 |
| 80524 | standard | Larimer | 40,030 |
| 80525 | standard | Larimer | 54,211 |
| 80526 | standard | Larimer | 44,326 |
| 80528 | standard | Larimer | 24,960 |
Finding a ZIP+4 in Fort Collins
Knowing which of these 5 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Fort Collins street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
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