Gilliam County, OR follows the Oregon statutory schedule. This page shows that schedule, the county's own website, and the late penalty — the county can still set its own dates, so confirm before you pay.
Ad slot · topreserved
…until 1st third — November 16, 2026
Instalment
Due date
Notes
1st third
November 16, 2026
First third due November 15; paying the full year by then earns a 3% discount.
2nd third
February 16, 2027
Second third due February 15.
3rd third
May 16, 2027
Final third due May 15; real property taxes unpaid after this date are delinquent.
Statewide schedule — read this before you rely on it
All 36 counties follow the same three statutory installment dates and the same interest rate. Most counties in this state follow these dates.
Interest of 1⅓% a month accrues from the day after each installment date until paid, and real property taxes not paid on or before May 15 are delinquent under ORS 311.510.
The tax year runs July 1 to June 30, and county tax collectors mail statements by October 25 for the November 15 first installment.
Gilliam County at a glance
Population: 2,026 (Census estimate, 2023) — the 34th largest of 36 Oregon counties and county equivalents.
Typical tax bill: $1,415 a year (median for owner-occupied homes, ACS 2022 5-year estimate) — the Oregon median is $3,633.
Land area: 1,204.7 sq mi, about 1.7 people per sq mi.
On a $400,000 purchase in Gilliam County, OR, property tax comes to about $2,684 a year — roughly $224 a month — at this county's effective rate of 0.67%.
$
Effective rate 0.67% = this county's median owner-occupied tax bill ($1,415, ACS 2022 5-year estimate) divided by the typical home value at the time ($210,778, Zillow, 2022-12-31). Exemptions the seller holds — homestead, senior, veteran — usually do not transfer with the deed, so a new purchase can run above this figure. The county assessor sets the assessed value; this is an estimate, not a quote.
How to pay Gilliam County property tax
County website:www.co.gilliam.or.us — start here for the treasurer or tax collector page.
By post: mail to the county treasurer; the postmark usually counts, not the arrival date.
In person: the treasurer's office, with your bill or parcel number.
Escrow: if your mortgage escrows taxes, the servicer pays — you still owe any shortfall.
Is this county verified?
Not yet. Gilliam County is on the queue: we publish a county's own published dates once they have been checked against the county website. Ask for it and it moves up. Until then, the Oregon statutory schedule above is the reliable starting point.
Ad slot · responsivereserved — add your AdSense ID in ads.js
StacyApproved is an independent reference and is not a government agency. Deadlines change and exceptions apply — always confirm with your county treasurer using the official link on this page. Nothing here is tax, legal or financial advice.