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Parcel identification number

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Short answer
A parcel identification number is the county's administrative identifier for a parcel, used on tax statements and in property records. Formats differ between Minnesota counties and the numbers are not unique statewide — the same PIN can exist in several counties, so a parcel is only identified by county and PIN together.

A parcel identification number is the county's administrative identifier for a parcel. It appears on the tax statement, in the assessor's records, and in the county's property information system.

It is the field almost every property database keys on, and it carries two traps.

It is not unique statewide#

The important one.

Minnesota counties assign PINs independently, in their own formats. The same number can exist in several counties.

That means a PIN on its own does not identify a Minnesota parcel. Only the combination of county and PIN does.

Anyone combining data across counties — an investor building a list, a researcher, anyone joining datasets — who treats the PIN as a unique key will silently merge records for unrelated properties in different counties. The join succeeds and the result is wrong, which is the worst kind of data error because nothing announces it.

Formats differ#

Some counties use a structure encoding section, township and range. Others use sequential numbering. Some include dashes, some do not, and the same county's records may show the number formatted differently in different systems.

Matching PINs between sources therefore requires normalising the format before comparing, and a naive string match will miss records that are actually the same parcel.

Different things answering different questions.

The PIN is an index. Convenient, short, what every system keys on, and reassigned when parcels split or combine.

The legal description describes the ground itself and survives those administrative changes.

Conveyances and liens use the legal description. Databases use the PIN. Confusing them is how a lien ends up recorded against the wrong parcel, and how an old record ends up pointing at land that no longer exists under that number.

When a PIN changes#

Splits and combinations retire the old number and create new ones.

Anything that referenced the old PIN — a delinquency record, an inspection history, a database entry — no longer connects to a live parcel unless somebody carries the link forward.

For long-running records on a property, that break in continuity is a real problem, and it is one of the reasons a parcel's full history is harder to assemble than it looks.

Practically#

Find yours on the tax statement, the Notice of Valuation and Classification, or by searching your address on the county's property information site.

Use it for looking things up. Use the legal description for anything that has to be legally correct.

Common questions

Is a PIN unique across Minnesota?
No. Formats are county-specific and the same number can exist in multiple counties. A parcel is only uniquely identified by the combination of county and PIN, which matters enormously for anyone combining data across counties.
Is a PIN the same as a legal description?
No. The PIN is an administrative index; the legal description defines the land. PINs are reassigned when parcels split or combine. Legal descriptions describe ground and survive those changes.
Where do I find my PIN?
On the property tax statement, on the Notice of Valuation and Classification, and in the county's property information system. It is also usually searchable by address on the county website.
Keep reading
Parcel
A defined unit of land with its own identification number, assessed, taxed and conveyed as a single property.
Legal description
The formal written identification of a parcel's boundaries used in deeds and recorded documents, distinct from its street address.
County recorder
The county office that maintains the public record of documents affecting abstract property, including deeds, mortgages, liens and easements.