The quickest way to find your Assessor’s Parcel Number is to look at your most recent property tax bill, where the APN is printed near the top of the first page next to your name and property address. If the tax bill isn’t handy, your county assessor’s website will return the same number in about a minute when you search by property address. Every parcel of real property in the United States is assigned an APN by the local tax assessor, and you’ll need yours for paying property taxes, recording deeds, and closing real estate transactions.
Documents That Already Show Your APN
Before you go online or pick up the phone, check the paperwork you already have. The number appears on more documents than most owners realize.
- Property tax bill. The most reliable place. The APN sits near the top of the first page, close to the owner name and property address. Some counties label it “Parcel Number” or “Tax ID.”
- Property deed. The recorded deed that transferred ownership to you includes the APN inside the legal description. Many jurisdictions require the APN on a deed before the county recorder will accept it for filing.
- Assessment notice. The annual or periodic notice from the county assessor showing your property’s assessed value lists the APN prominently, since it’s the assessor’s own tracking number.
- Title insurance policy. If you bought title insurance at closing, the policy identifies the property by its APN.
- Mortgage statement or closing documents. Your loan paperwork and closing disclosure often reference the APN in the legal description or property identification sections.
Any of these will work. The APN doesn’t change with ownership, so even an old tax bill from the previous owner shows the same number, unless the parcel has been split or merged since then.
Search Your County Assessor’s Website
Nearly every county assessor’s office runs a free online property search tool. Go to the website for the county where the property sits and look for a link labeled “Property Search,” “Parcel Lookup,” or “Property Records.”
The search usually accepts a property address, an owner’s name, or both. Address searches are the most direct. Type in the street number and name, and the record comes back with the APN, the assessed value, and ownership details. Owner-name searches can return several results if the owner holds multiple properties in the county.
Some county sites also offer a GIS map viewer. You can zoom to the property, click the parcel, and see its APN in a pop-up. That’s helpful for vacant land or a neighboring lot where you don’t have a clean street address.
Contact the Assessor’s Office Directly
When the online tools don’t work, or you’d rather talk to a person, call or visit the county assessor’s office. Staff run these lookups constantly and can pull up a parcel number in seconds from a property address. This is the office that assigned the number, so it’s the definitive source.
Have the full street address ready. For vacant land without an address, a description of the location, nearby cross streets, adjacent owners, or GPS coordinates, helps staff narrow it down. Most offices provide the APN over the phone at no charge.
Real estate agents and title companies can also look up an APN as a routine part of any transaction. If you’re already working with one on a purchase or sale, they’ll have the number.
What an APN Looks Like
Knowing the format helps you spot the number on a document. An APN is typically a string of digits separated by hyphens, and each segment encodes location information. A common format reads something like 123-456-789, where the first group identifies a district or area, the second points to a map page or block, and the third pinpoints the individual lot.
The exact length and structure vary by county. Some use eight digits, others use twelve or more, and some include letters. Once you’ve seen your county’s format, the APN is easy to pick out on any page.
Other Names for the Same Number
Don’t get thrown off by different labels. The number one county calls an Assessor’s Parcel Number goes by several other names: Parcel Number, Tax ID Number, Property Identification Number (PIN), Assessor’s Identification Number (AIN), Property Account Number, or Folio Number. They all refer to the same thing, a unique code the local tax authority uses to identify a specific piece of land. If a form asks for any of these and you only know your APN, that’s the number it wants.
When the APN Changes
An APN stays with a property through ownership changes, refinancing, and renovations. Two situations do trigger a new number: splitting a parcel and merging parcels.
When a property is subdivided, each new lot gets its own APN and the original number is retired. If you buy a lot in a new subdivision, the developer’s original APN won’t be yours; your lot will have a freshly assigned number on the new plat map.
Mergers work the reverse way. When adjacent parcels under the same ownership are combined, the old APNs are retired and one new number takes their place. After a consolidation, confirm with the assessor’s office that the change has been processed so your tax bill and title records match.
Correcting an APN Error
Clerical mistakes happen. A digit gets transposed on a tax bill, or a deed is recorded with the wrong parcel number. Left uncorrected, these errors can cause property tax payments to land on the wrong parcel and can stall a future sale or refinance when a title search turns up the discrepancy.
If you spot an error, contact the county assessor’s office. They have procedures for correcting clerical mistakes on the tax roll, and you’ll typically need documentation showing the correct information, such as a recorded deed, survey, or prior tax bill with the right number. If the error appears on a recorded deed rather than just a tax bill, you may also need to file a corrective deed with the county recorder. A title company or real estate attorney can prepare that document. Catching these errors early keeps your records clean and your next transaction on schedule.