An Assessor's Parcel Number, or APN, is a number assigned to parcels of real property by the tax assessor of a particular jurisdiction for purposes of identification and record-keeping. The assigned number is unique within the particular jurisdiction, and may conform to certain formatting standards that convey basic identifying information such as the property type or location within the plat map.
In the United States, APNs are typically assigned by the local taxing authority, such as the city or county within which the property is located. Many taxing authorities will provide property tax information to the public, indexed by APN.
Alternative terms with the same meaning include:
The term or terms used in any particular jurisdiction are as determined by the authority assigning the numbers.