What is parcel data?
Parcel data is the structured information county assessors and recorders maintain about every individual unit of land — including ownership, legal description, assessed value, tax status, and physical attributes — assigned to a unique parcel identifier.
Every piece of land in the United States is divided into parcels: discrete units of real property that can be individually owned, taxed, and transferred. County assessors create and maintain a record for each parcel in their jurisdiction, typically updated at least once a year (and for some attributes, on every ownership transfer).
A parcel record typically includes: owner name and mailing address, the Assessor's Parcel Number (APN), legal description and acreage, land use classification, assessed land value, assessed improvement value, tax status (current, delinquent, or exempt), and the date of last sale with recorded price.
The value of parcel data lies in its completeness and authority. Because the county uses it to levy taxes and record legal ownership, it is the most accurate single source for who owns what and where. No other database has the same statutory obligation to be correct.
For real estate professionals, parcel data underpins nearly every workflow: absentee-owner lists start with the mailing address; pre-foreclosure research starts with tax status; comp analysis uses sale history; permit research uses the APN as a key to cross-reference other databases. Tracts sources parcel data directly from county assessors and recorders, bypassing aggregator intermediaries to preserve recency and field accuracy.