What are the population thresholds for the American Community Survey (ACS)?

The population thresholds for American Community Survey (ACS) estimates are:

• 1-year estimates: Geographic areas with a population of 65,000 or more
• 1-year Supplemental Estimates: Geographic areas with populations of 20,000 or more
• 5-year estimates: All areas regardless of population size, down to the census tract and block group level.

Learn more on the When to Use 1-Year or 5-Year Estimates page.