Certificates of survey
Survey references (COS) tied to parcels, with a link to the county recorder where the survey can be pulled.
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About this data
- Published by
- MT DNRC cadastral and county recorders
- Method
- The COS number on each cadastral parcel, joined to each county recorder’s search link.
- Update frequency
- Monthly with the cadastral
- Last updated
- Oct 6, 2026
- Records
- 73,364
- Coverage
- All 56 counties where the cadastral carries a COS number.
Records in 56 of 56 counties.
Known gaps
We index the reference only; survey images stay at the recorder.
Preview
The newest or first 500 records. Click a column heading to sort. Use the filter to find a place or a name.
Fields
| Field | Column | Description |
|---|---|---|
| COS number | cos | Certificate of Survey number. |
| County | county | |
| Owner | owner | Companies and governments by name; people as “Private individual”. |
| Acres | acres | GIS acres. |
| Recorder link | rec | County recorder search. |
| Parcel ID | parcel | State geocode (17 digits). |
Downloads and links
Data 4 MT is an index of public records. It republishes only what Montana and federal agencies make public, with a link to the source on each record. People are shown as “Private individual” on public pages and downloads; companies, trusts held by institutions, and governments keep their names. No document images, sale prices, voter, MVD or wildlife-telemetry data are stored. Verify any record against the publisher’s copy before relying on it.