Adams County, CO
Online lien sale on adams.coloradotaxsale.com — live Oct 26 to Nov 6, registration Oct 19–30
Adams County runs its tax lien sale entirely online: registration, bidding and the list of available properties are all at adams.coloradotaxsale.com. The treasurer's 2026 schedule has registration open October 19–30 and the live tax sale running from October 26 through November 6, 2026. The tax list is published in the Northglenn-Thornton Sentinel on September 24, October 1 and October 8. The county says details for the current year's sale go up in mid-October and flags every date as subject to change, so recheck the schedule before funding a deposit. Delinquent mobile home taxes have their own sale notice and list on the same treasurer's page.
Adams County has updated its statutory redemption interest rate to 13%, effective October 1, 2026 — the rate Colorado sets every September at nine points above the federal discount rate. Investors don't bid that rate down; they compete with a premium, which goes to the county, earns nothing and isn't paid back when the owner redeems. The treasurer also publishes an endorsement list (Excel, CSV and PDF) — the later-year taxes that current certificate holders can add to liens they already own at the same rate. If a lien goes three years without being redeemed, the holder can apply for a treasurer's deed, which now goes to public auction under C.R.S. article 11.5, and certificates issued from January 1, 2026 expire after seven years unless a deed application is pending.
Colorado rules at a glance
Colorado's rate is nine points above the federal discount rate, set each September 1 by the State Bank Commissioner (C.R.S. 39-12-103): 13% for liens sold from October 1, 2026. Bidders compete on a premium that goes to the county and earns no interest (C.R.S. 39-11-115). From August 1 of the third calendar year after the sale the holder can apply for a treasurer's deed, which now means a public auction (C.R.S. art. 11.5); the owner can redeem until seven days before it.
The statute, the bidding and what goes wrong for new buyers are on the Colorado page; every sale date we have sourced for Adams County is on the Adams County page.
Property & tax profile
The median homeowner in Adams County pays $2,962 a year in property tax — above the Colorado median of $2,602 (U.S.: $3,119). That is roughly what a typical home here owes after one missed year — about the face value of a one-year certificate, before interest, fees and any premium. Homes with a mortgage pay a median of $3,146; homes owned outright, $2,516.
On a home with a mortgage, the lender has its own reason to pay a delinquent tax bill: the tax lien outranks the mortgage, and a tax deed can wipe out the loan. On a home owned outright, nobody but the owner — or the heirs — has that reason. In Adams County, 28.1% of owner-occupied homes are owned outright (Colorado: 30.6%, U.S.: 39.4%). About the same as the state as a whole.
3.6% of all housing units in Adams County are vacant. The figure that matters for a lien buyer is the Census “other vacant” category — not for rent, not for sale, not a holiday home, but a catch-all that includes foreclosures, homes held up by legal proceedings or family reasons, homes needing repairs, and abandoned ones. Here it is 1.2% of all units (Colorado: 1.7%, U.S.: 3.6%). That is below the state rate: fewer empty properties on the list than elsewhere in Colorado.
Half of the homes in Adams County were built in or before 1991 (Colorado: in or before 1988). The typical tax bill is 3.1% of the median household income of $94,571 (Colorado: 2.7%).
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (tables B25077, B25103, B25081, B25002, B25004, B25035, B19013) — see the figures on data.census.gov. Survey estimates with margins of error; anything too uncertain to state is left out.
Before you bid: Register on the auction site, not at the county office, and read the deposit and payment rules there once the 2026 information is posted. Because the county marks its dates as subject to change, confirm them with the Adams County Treasurer's Office before bidding.
Official source: adamscountyco.gov — checked October 4, 2026
More sales: 41 other county sales are on the calendar in October 2026 — see them by date; or the upcoming sales in Colorado.
This page reflects publicly posted county auction notices as of publication and is general information, not financial or legal advice. Sale details can change — always confirm current terms with the county directly.