| City: | Boulder, Colorado |
| Names to Avoid: | University Of Colorado |
| County: | Boulder County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 8:59:47 AM |
| Population: | No Population Data |
| Area Codes: | 303 / 983 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 40.0075, -105.2722 |
| Quick Link: |
The University of Colorado Boulder operates under dedicated ZIP code 80309 in Boulder County. Founded in 1876, five months before Colorado achieved statehood, CU Boulder serves as the flagship campus of the University of Colorado system and ranks among America's leading public research universities. The 600-acre campus sits at the base of the Flatirons, iconic rock formations visible throughout Boulder. This postal designation has served the university for over two decades.
With 705 ZIP+4 codes spanning 237 named delivery points, this represents one of the most complex mail operations among unique ZIPs nationwide. The postal infrastructure reflects the university's breadth: mail routes to the Norlin Library, the Law School, the College of Engineering and Applied Science, and research centers including JILA (a renowned physics research institute), LASP (Laboratory for Atmospheric and Space Physics), and the Fiske Planetarium. Academic departments from Aerospace Engineering to Women's Studies maintain their own delivery codes.
Residence halls including Baker Hall, Farrand Hall, Libby Hall, Willard Hall, and Williams Village each have dedicated mail routing, though Census demographic data for this ZIP reflects primarily academic buildings rather than student housing. Census Business Patterns shows 22 establishments and 355 employees. Located approximately 25 miles northwest of Denver near Boulder's University Hill neighborhood, the campus borders the Central Boulder and East Boulder areas. Boulder serves as the valid mailing city.
| Establishments: | 22 |
| Employment: | 355 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 80309 supports both business and residential activity. According to the Business Census (2024), there are 21 business establishments, employing about 391 people with an annual payroll of $11,462,000. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 1Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 21Source: CBP |
| 1st Quarter Payroll: | $2,809,000Source: CBP |
| Annual Payroll: | $11,462,000Source: CBP |
| # of Employees: | 391Source: CBP |
ZIP Code 80309 is located in Boulder County, Colorado, within the Boulder, CO Metropolitan Statistical Area (CBSA 14500) and Colorado's 2nd Congressional District. This Metro area has a population of 294,567 people, about 0.00% of whom live in ZIP Code 80309. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Boulder, COSource: Census |
| CBSA Number: | 14500Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 294,567Source: Census |
| MSA: | Denver-Boulder-Greeley, CO CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 7535.34 sq miSource: Census |
| PMSA: | Boulder-Longmont, CO PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0807850Source: Census |
| Place Name: | Boulder city; ColoradoSource: Census |
We could not locate which school district 80309 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.