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Background Information

The County-to-County Migration data are updated annually and based on the year-to-year changes in the addresses shown on the population of returns from the IRS Individual Master File system.  The data present migration patterns by county for the entire United States and each individual State, including inflows and outflows.  The data are available for Filing Years 1984 through 2007, and include the following:

• Number of returns (which approximates the number of households)
• Number of personal exemptions (which approximates the population)
• Total "adjusted gross income" (starting with Filing Year 1993)
  
  Here is Migration data into and out of one county as an example of the data contained in the entire United States file for Filing Year 2007.

Pricing

The County-to-County Migration Data are updated annually and available for purchase as follows:

• $200 per year for the entire United States
• $10 per year per State
• $500 for the entire United States for all years

Payments for SOI County-to-County Data

Contact Information

Contact the Statistical Information Services (SIS) Office for information on prices, sources, and ordering instructions:

Statistical Information Services
Statistics of Income Division
Internal Revenue Service
P.O. Box 2608
Washington, DC 20013-2608

SIS Email
Voice:   (202) 874-0410
Fax:      (202) 874-0964

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