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  1. The ZIP Codes in Boulder range from 80301 to 80503. Of the ZIP codes within or partially within Boulder there are 5 Standard ZIP Codes, 3 Unique ZIP Codes and 3 PO Box ZIP Codes. The total population of ZIP Codes in Boulder is 129521. Data Updated October 2, 2024. Map List Related.

  2. Oct 1, 2024 · The combined population for all ZIP Codes in Boulder, CO is 131,690. Population Density is 823.06 persons per square mile. Average Household Size is 2.20 persons and Average Family Size is 3.29 persons. The Census Designated Place population for Boulder city; Colorado is 108,250.

  3. ZIP Codes for BOULDER, Colorado. Use our address lookup or code list to find the correct 5-digit or 9-digit (ZIP+4) code for your postal mails destination.

  4. A Complete List of All 29 ZIP Codes in Boulder, CO. Most Popular ZIP Code Searches in Colorado

  5. Map of ZIP Codes in Boulder County Colorado - Updated October, 2024

  6. Boulder Zip code, introduced by the United States Postal Service (USPS) in 1963, are numerical codes used to identify specific geographic regions for mail delivery. and Boulder zip code used a 5-digit postal format XXXXX, The first 3 digit represent the postal delivery zone code, and last 2 digit represent the Post office in the Boulder.

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  8. Boulder, CO Stats and Demographics for the 80305 ZIP Code. ZIP code 80305 is located in northern Colorado and covers a slightly less than average land area compared to other ZIP codes in the United States. It also has a slightly higher than average population density. The people living in ZIP code 80305 are primarily white.

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