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Teton County, Wyoming property-tax payment and appeal deadlines

Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Teton County Assessor; Teton County Treasurer (property-tax collection).

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Confirm

Not published in the reviewed official sources.

Statement mailing

Published

On or before the fourth Monday in April for the 2026 Notice of Assessment; the separate tax bill is sent in fall after levies are set.

Payment deadline

Published

For 2026 property taxes: first 50% installment due November 10, 2026; second 50% installment due May 10, 2027; full payment by December 31, 2026 avoids interest on the first half.

Valuation protest

Published

Within 30 days of the 2026 Notice of Assessment mail date; Teton County states the appeal period runs from the printed date mailed.

Do not assume a grace period.

The reviewed record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.

Treat a published payment deadline as a hard operational date and retain your receipt or confirmation number.

From assessment to collection

01Valuation and notice

Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.

02Statement and account review

Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.

03Payment confirmation

Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.