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SOI Tax Stats - State-to-State Migration Database Files

State and county migration statistics will continue to be produced and posted on this site. Statistics for 1990 through 2010 are currently available. Statistics for 2011 will be posted as soon as they are completed. In addition, work is underway at IRS and the Bureau of the Census to develop additional migration statistics that take advantage of improved data that have recently become available.

Data files are available for download in two formats:

• Generic ASCII data files (.dat file extension)—These require a record layout to read.
• Comma Separated Values files (.csv file extension)—Data items are separated by commas, where each new line represents a new row.