Census-designated place Altona is a census-designated place in Colorado, in Boulder County. A census-designated place is an unincorporated community that the Census Bureau defines for statistics; it has no city government of its own.
The median owner-occupied home in Altona had a real-estate tax bill of $7,047 (± $1,262) a year, compared with $2,448 in Colorado and $2,969 nationwide. The median home value was $1,168,400 (± $478,615), compared with $502,200 in Colorado and $303,400 nationwide.
| Measure | Altona | Colorado | United States |
|---|---|---|---|
| Population | 532 ± 161 | 5,810,774 | 332,387,540 |
| Median annual property tax bill (homeowners) | $7,047 ± $1,262 | $2,448 ± $10 | $2,969 ± $3 |
| Median home value | $1,168,400 ± $478,615rough guide only: the margin of error is 41% of the estimate | $502,200 ± $2,298 | $303,400 ± $362 |
| Median household income | $250,001 | $92,470 ± $483 | $78,538 ± $176 |
| Property tax as a share of home value (calculated) | 0.60% ± 0.27 pointsrough guide only: the margin of error is 45% of the estimate | 0.49% ± under 0.01 points | 0.98% ± under 0.01 points |
| Homes lived in by their owners | 84.6% ± 15.0 points | 66.3% ± 0.3 points | 65.0% ± 0.3 points |
| Owner households headed by someone 65 or older | 42.5% ± 20.6 pointsrough guide only: the margin of error is 48% of the estimate | 28.9% ± 0.2 points | 32.6% ± 0.2 points |
| Owners spending 30% or more of income on housing costs | Too imprecise to report (estimate 11.0%, margin of error ± 19.5 points) | 24.2% ± 0.3 points | 22.2% ± 0.1 points |
How to read these numbers
- These are estimates from a survey, not a count. The American Community Survey asks a sample of households. The ± figure is the Census Bureau’s margin of error: the true value is very likely within that range of the estimate. Small places have large margins.
- “Too imprecise to report” means the margin of error is at least half of the estimate, so printing the number would suggest accuracy that does not exist. A “rough guide only” note means the margin is a quarter to a half of the estimate.
- Property tax bill and home value are medians for owner-occupied homes. Half of the homes are above the figure and half below. A median bill is not the rate set by a city or town; the bill combines taxes levied by every local government that serves the home, such as the school district and county.
- “Calculated” rows are worked out by Untax the Roof from the Census figures above them. They compare two medians, so they describe the place, not a particular household.
- Missing is not zero. Where the Census Bureau publishes no figure, this page says so.
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2019–2023: tables B25103 (real estate taxes), B25077 (home value), B19013 (household income), B01003 (population), B25003 (owners and renters), B25007 (age of householder), B25091 (housing costs as a share of income); see the Census ACS data page.
If property taxes go unpaid in Colorado
How it works. County tax-lien sale followed by treasurer-deed/public-auction process
Excess sale money. Post-Tyler statutory reforms created/revised auction process intended to protect taxpayer value above tax debt; current process includes treatment of proceeds through auction/deed framework
These rules are set by Colorado, not by Altona, so this section is the same for every place in the state. Last verified 2026-09-25. See the full Colorado entry with statute links.