Reviewed and updated October 11, 2026 by the SearchSystems.net editorial team. Every office link was opened and checked against the office's own site between September 24, 2026 and October 11, 2026.
Petroleum County, Montana, has 525 residents (2024 Census Bureau estimate). The title to a parcel in Petroleum County is in the deed records of the Clerk and Recorder and its taxable value is set by the Property Assessment Division; what is built on it is a matter for the city or the county. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, evictions and court cases, records requests and common questions.
Related guides: Petroleum County public records, Petroleum County arrest records, Petroleum County warrants, Petroleum County inmate search, Petroleum County criminal records, Montana arrest records and Montana inmate search.
Deeds, Mortgages and Liens in Petroleum County
Deeds, mortgages, liens and easements that affect title to land in Petroleum County are recorded by the Clerk and Recorder, which indexes them by name and sells copies.
SearchSystems opened and checked the Clerk and Recorder's page at petroleumcountymt.org/departments/county-clerk-and-recorder (page title: Clerk and Recorder | Petroleum County Montana), phone (406) 429-5311, 302 East Main, Winnett, MT 59087, which answered when SearchSystems opened it on September 24, 2026.
Assessed Values and the Tax Roll in Petroleum County
The Property Assessment Division sets the value each parcel in Petroleum County is taxed on and keeps the parcel maps. Montana property is appraised by the state Department of Revenue, not the county, on a two-year cycle.
SearchSystems opened and checked the Property Assessment Division's page at petroleumcountymt.org/departments/assessor (page title: Assessor | Petroleum County Montana), phone (406)896-4015, 302 East Main, Winnett, MT 59087, which answered when SearchSystems opened it on October 11, 2026.
Evictions and Court Cases About Land in Petroleum County
An eviction is a court case in the Justice Court, and so is a foreclosure, a lien dispute or a quiet title suit, in the Petroleum County District Court; the court file is public unless sealed.
The court records page SearchSystems verified for the county is at courts.mt.gov/Courts/portals.
Asking a County Office for a Record
Under the Montana Public Records Act a county office must answer a request in a timely manner; the statute sets no number of days, and it may charge the actual cost of fulfilling the request.
Frequently Asked Questions
Who records deeds in Petroleum County?
The Clerk and Recorder, at petroleumcountymt.org, phone (406) 429-5311. Deeds, mortgages and liens on land in Petroleum County are filed there, and the Property Assessment Division (petroleumcountymt.org/departments/assessor) has the assessment records.
Who sets the assessed value of a property in Petroleum County?
The Property Assessment Division, whose page SearchSystems verified is at petroleumcountymt.org/departments/assessor.
Where are evictions from Petroleum County filed?
In the Justice Court. The file is public unless the court seals it.
How is property assessed in Montana?
Montana property is appraised by the state Department of Revenue, not the county, on a two-year cycle.
Is this the official Petroleum County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.