Alto, CA
Alto is an unincorporated community in Marin County, population 732 (2020 Census).
ZIP code: 94941
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Own a business in Alto? Listings are free.
Add your businessAlto is an unincorporated community in Marin County, population 732 (2020 Census).
ZIP code: 94941
Own a business in Alto? Listings are free.
Add your business