These files were compiled from Census 2000 responses to the long-form (sample) questions on where people worked. The files present data at the county level.

The sort order refers to whether the county of residence or the county of work is the main focus. If you are interested in the number of people who live in a county, and want to know where they work, you should download one of the files sorted by county of residence. These files will show you all the work destinations for people who live in each county.

On the other hand, if you are interested in the people who work in a county, and want to know where they come from, download one of the files sorted by county of work. These files will show you all the origins for people who work in each county.

Documentation file (including the record layout) for the text files)

Note: In reviewing the Census 2000 County-to-County Worker Flow Files before release, some errors were discovered in a number of the county-to-county flows. These errors have been corrected. However, as a result of the corrections the data in these files may not agree with data previously released in Summary File 3 (SF3) and related products. In particular, there may be differences in the number of people working in the state and/or county of residence between SF3 and similar estimates derived from these files.