Census tract lookup (GEOID or tract number)
Updated
Enter an 11-digit GEOID or a tract number to see the county, OZ 2.0 eligibility (IRS Rev. Proc. 2026-14 appendix), the rural flag, whether it is in a current (2018) Opportunity Zone (CDFI Fund list) and, where the state has published one, its OZ 2.0 nomination status. Have a street address? Use the OZ map search.
How GEOIDs work
A 2020-census tract GEOID is 11 digits: state (2), county (3), tract (6). The 6-digit tract code is the tract number without the decimal point, padded with zeros, so tract 34.03 is 003403 and tract 9501 is 950100 (U.S. Census Bureau, Understanding Geographic Identifiers). Every tract in our data also has its own page under its state, for example tract 601.02, Greene County, Alabama.
FAQ
What is a census tract GEOID?
An 11-digit code: 2 digits for the state, 3 for the county and 6 for the tract. Tract 601.02 in Greene County, Alabama is 01 + 063 + 060102 = 01063060102 (U.S. Census Bureau, GEOIDs).
How do I find the census tract for an address?
Search the street address on the OZ map. It geocodes the address to a 2020 census tract and shows the GEOID, OZ 2.0 eligibility and current (2018) zone status. This page is for when you already have a GEOID or tract number.
Why does the same tract number appear in several places?
Tract numbers are only unique inside a county, so "tract 9501" exists in many counties. Add the county and state, or use the 11-digit GEOID.
Which tracts are covered?
All 24,547 tracts on the OZ 2.0 eligibility list in the IRS Rev. Proc. 2026-14 appendix, plus every 2020 tract fully or partly inside a current (2018) Opportunity Zone on the CDFI Fund list.
Not tax advice. Tract boundaries follow the 2020 census; current (2018) zones were drawn on 2010 tracts and matched with the Census relationship file (how we match).