Variance Replicate Estimate Tables include estimates, margins of error, and 80 variance replicates for selected American Community Survey 5-year Detailed Tables. The tables are intended for advanced users who are adding ACS data within a table or between geographies. Users can calculate margins of error for aggregated data by using the variance replicates. Unlike available approximation formulas, this method results in an exact margin of error by using the covariance term.
To access the tables, please visit the Variance Replicate Tables data page.
Contains worked examples and instructions to calculate margins of error for aggregated estimates, percentages, and ratios
Contains a list of tables and types of geographic areas that have variance replicate estimates
For all geographies except the tract and block group level, variance replicate tables are named using the table ID. The tract and block group files are named by table ID + State FIPS code. All published ACS table IDs and table layouts may be found in the Table Shells. The 2-digit FIPS state code and the state name that corresponds to it may be found in the ANSI Codes for States​.