Here you will find file naming convention for various files types.

Here you will find field names and descriptions for our files.

Notes about changes and updates to geographic products.

View the available technical documents from the Geography program.

Substantial county changes include all county boundary changes affecting an estimated population of 200 or more people.

Geographic Change Notes are selected geographic changes to incorporated places, census designated places, county subdivisions, counties and equivalent areas.

Here you will find information about the various codes we use and crosswalks between codes and geographic entities.

Information about identified errors and corrections involving geography data.