ZIP code 80305
Where is ZIP code 80305?
Boulder, Colorado
Boulder County · Standard ZIP code
ZIP code 80305 belongs to Boulder, Colorado in Boulder County. 80305 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Mountain Time zone and uses area codes 303, 720 and 983. About 16,291 people live in the 80305 area, where the median household income is $126,107. The closest ZIP codes are 80303 (Boulder, 1 mi northeast), 80309 (Boulder, 2.5 mi north) and 80310 (Boulder, 2.5 mi north).
| ZIP code | 80305 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Boulder |
| State | Colorado (CO) |
| County | Boulder County |
| Time zone | Mountain Time · now |
| Area codes | 303, 720, 983 |
| Coordinates | 39.9807, -105.2531 map |
| 3-digit prefix | 803 |
Population and income in 80305
| Population | 16,291 · higher than 72% of Colorado ZIP codes |
|---|---|
| People per square mile | 2,799 · higher than 85% of Colorado ZIP codes |
| Median age | 36.7 years · lower than 74% of Colorado ZIP codes |
| Men / women | 51% / 49% |
| Median household income | $126,107 · higher than 86% of Colorado ZIP codes |
| Income per person | $74,287 |
| Below the poverty line | 12% |
| Bachelor’s degree or higher | 79% of adults 25+ |
| Median home value | $1,032,900 · higher than 97% of Colorado ZIP codes |
| Median rent | $2,311 a month |
| Housing units | 7,303 |
| Households | 6,976 (2.32 people on average) |
| Owners / renters | 60% / 40% |
| Land area | 5.82 sq mi (plus 0.05 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 80305. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 80305
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 80303 | Boulder, CO | 1 mi NE | Standard |
| 80309 | Boulder, CO | 2.5 mi N | Unique |
| 80310 | Boulder, CO | 2.5 mi N | Unique |
| 80302 | Boulder, CO | 3 mi NW | Standard |
| 80025 | Eldorado Springs, CO | 3.8 mi SW | PO Box only |
| 80304 | Boulder, CO | 4.1 mi N | Standard |
| 80301 | Boulder, CO | 5.2 mi NE | Standard |
| 80027 | Louisville, CO | 5.7 mi E | Standard |
| 80308 | Boulder, CO | 7.8 mi NW | PO Box only |
| 80026 | Lafayette, CO | 8.4 mi E | Standard |
| 80007 | Arvada, CO | 9.2 mi SE | Standard |
| 80544 | Niwot, CO | 9.6 mi NE | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 80305 or measure the distance to another ZIP code.
How to address mail to 80305
123 MAIN ST
BOULDER CO 80305
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (80305-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Boulder, CO
All Boulder ZIP codes with population and income →
Questions
- What city is ZIP code 80305?
- 80305 is a Boulder, Colorado ZIP code.
- What county is 80305 in?
- ZIP code 80305 is in Boulder County, Colorado.
- What time zone is ZIP code 80305 in?
- 80305 is in the Mountain Time zone (America/Denver).
- What area code is 80305?
- Phone numbers in ZIP code 80305 use area codes 303, 720 and 983.
- What is the population of ZIP code 80305?
- About 16,291 people live in ZIP code 80305, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 80305?
- The median household income in 80305 is $126,107 a year, higher than 86% of Colorado ZIP codes.
- What ZIP codes are near 80305?
- The nearest ZIP codes to 80305 are 80303 (Boulder, 1 miles), 80309 (Boulder, 2.5 miles), 80310 (Boulder, 2.5 miles) and 80302 (Boulder, 3 miles).