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American Community Survey

Census.govAmerican Community Survey › Methodology: Sample Size and Data Quality
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Sample Size and Data Quality

The quality measures provided in this section illustrate the steps the Census Bureau takes to ensure that American Community Survey data are accurate and reliable.

1. How large was the sample used to produce the ACS estimates?

Sample Size:      

Sample Size Definitions

2. How well does the ACS cover the population?

Coverage Rates:      

Coverage Rates Definitions


3. What was the response to the survey?

Response Rates:      

Response Rates Definitions

4. How complete were the data used to produce a specific estimate?

Item Allocation Rates:   

Item Allocation Rates Definitions



Source: U.S. Census Bureau | American Community Survey Office | Email ACS | Last Revised: June 26, 2014
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