Blocksburg, California Zip Codes
📍 Blocksburg is in Humboldt County, California with 1 zip code; the most populous is 95514.
Blocksburg is a USPS city name in Humboldt County, California with a Census population of approximately 117 across its ZIP codes. Humboldt County as a whole has 38 ZIP codes in this directory. Below you'll find every zip code serving Blocksburg with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Blocksburg Zip Codes
Blocksburg at a Glance
Blocksburg has 1 ZIP code in this directory: 1 standard delivery ZIP.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Blocksburg Zip Code Map
Interactive map of Blocksburg, California zip codes. Click any marker for details.