Welcome to the official website of Jefferson County New York


U.S. Census

The Planning Department works with the US Census Bureau every ten years to prepare for the Official Census.  Staff reviews and updates the Census Master Address File, reviews municipal boundaries for changes, updates the address file with new construction data, and reviews census tracts and block groups to ensure they are within the required population criteria.

2020 Census How it will Work

Census Partnership Fact Sheet

County Roads Census

Faith Community Census Partner

Your Faith, Your Community, and the Census