ZIP codes in San Miguel County

23 ZIPs touch San Miguel County, New Mexico. The blue dashed line is the county border; orange ZIPs reach into it.

ZIP codes

cross the county line

37,729

people in these ZIPs

counties in NM

Most people

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San Miguel County ZIP list

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All 33 counties in New Mexico

Questions people actually ask

How many ZIP codes are in San Miguel County, New Mexico?

23 ZIP codes reach into San Miguel County. 11 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in San Miguel County has the most people?

87701 (Las Vegas) has about 17,339 residents, the most of any ZIP touching San Miguel County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in San Miguel 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 San Miguel 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