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ZIP codes in Pitkin County

8 ZIPs touch Pitkin County, Colorado. The blue dashed line is the county border; orange ZIPs reach into it.

8

ZIP codes

2

cross the county line

35,562

people in these ZIPs

64

counties in CO

Most people

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Pitkin County ZIP list

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Questions people actually ask

How many ZIP codes are in Pitkin County, Colorado?

8 ZIP codes reach into Pitkin County. 2 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Pitkin County has the most people?

81623 (Carbondale) has about 15,067 residents, the most of any ZIP touching Pitkin County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Pitkin County and another county?

Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Pitkin County. For one address, pin the exact spot on the ZIP finder to see its county.

Where does this list come from?

ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.

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Updated 2026-11-10 · Where the data comes from