Boulder, CO 80305 ZIP Code Profile

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Boulder, CO

ZIP Code 80305: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Boulder, CO 80305

  • ZIP Code Type: STANDARD
  • County: Boulder County
  • Centroid: Latitude 40.016, Longitude -105.271
  • Time Zone: Mountain Time Zone (UTC -7 hours)
  • Observes DST: Yes
  • Businesses Addresses: 211
  • PO Box Addresses: 0
  • Residential Addresses: 7,331
    • Multi-Family Addresses: 1,001
    • Single Family Addresses: 6,330

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


80305 ZIP Code Map

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Boulder, CO 80305 Data & Demographics (As of July 1, 2017)


Total Population 17,735
Daytime Population: Workers 7,886
Daytime Population: Residents 7,711
Total Daytime Population (TDP) 15,597
Ratio TDP/Total Population1 0.88
Population in Households 17,702
Population in Familes 10,861
Population in Group Qrtrs 33
Population Density2 2,930
Diversity Index3 28


Median Household Income $86,929
Average Household Income $122,150
Per Capita Income $50,706


Total Housing Units 7,507 (100%)
Owner Occupied HU 4,335 (57.7%)
Renter Occupied HU 3,017 (40.2%)
Vacant Housing Units 155 ( 2.1%)
Median Home Value $491,461
Average Home Value $571,390


Total Households 7,352
Average Household Size 2.41
Family Households 3,847
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.84% 0.83%
Households 0.71% 0.75%
Families 0.56% 0.64%
Median Household Income   2.66%
Per Capita Income   2.38%

Boulder, CO 80305 - Peer Comparisons by Rank and Percentile

The table below compares 80305 to the other 503 ZIP Codes in Colorado by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 127 75th
Population Density # 71 86th
Diversity Index # 353 30th
Median Household Income # 60 88th
Per Capita Income # 48 91st

Additional comparisons and rankings can be made with a VERY EASY TO USE Colorado Census Data Comparison Tool.

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