Boulder County · Colorado
ZIP code 80305
- Population
- 16,101
- Median income
- $120,933
- Median home
- $985,700
- Sales tax
- 2.9%
ZCTA residents
Household, past 12 months
Owner-occupied value
Colorado state rate
Quick answer
ZIP 80305 sits in Boulder County, Colorado and is home to 16,101 people. Median household income is $120,933, the median home is worth $985,700 and median gross rent is $2,198. 62.4% of households own their home, and purchases are taxed at 2.9% (Colorado state rate).
- County
- Boulder County
- State
- Colorado (CO)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 08013
528 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 80305
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 16,101ZIP 80305 residents
- Median household income
- $120,933Past 12 months, inflation adjusted
- Median home value
- $985,700Owner-occupied units
- Median gross rent
- $2,198Rent plus utilities, monthly
- Median age
- 37.7 yrsAll residents
- Homeownership rate
- 62.4%Owner-occupied households
Sales tax in 80305
What a purchase inside this ZIP costs at checkout.
Colorado levies 2.9% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 80305 compares
ZIP 80305 against the median ZIP in Boulder County and across Colorado.
| Measure | ZIP 80305 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $120,933 | $118,465 | $80,917 | +49% |
| Median home value | $985,700 | $761,500 | $428,850 | +130% |
| Median gross rent | $2,198 | $1,884 | $1,455 | +51% |
| Population | 16,101 | 11,816 | 2,604 | +518% |
Medians are computed across the 18 ZIP areas in Boulder County and the 528 ZIP areas in Colorado.
Statewide rank
Where this ZIP places among all 528 Colorado ZIP areas.
- Income
- #60
- Home value
- #12
- Population
- #145
richer than 87% of 468 state ZIPs
above 97% of 472 state ZIPs
larger than 73% of 528 state ZIPs
Comparable ZIP codes
Colorado ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Boulder County.
ZIP 80305 questions
Common questions about this ZIP code.
- Where is ZIP code 80305?
- ZIP 80305 lies mostly in Boulder County, Colorado. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 80305?
- Colorado charges 2.9% statewide, plus any county, city or district rate that applies locally.
- Is 80305 expensive to live in?
- Median rent runs $2,198 a month, about 22% of median household income, and the median home is worth $985,700 — +130% against the typical Colorado ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Colorado Department of Revenue — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.