The zip files contain Python scripts and SQLite databases needed to replicate the modeling, analysis, and accuracy assessment discussed in the manuscript. R scripts are also included, which can be used to replicate the spatial interaction model (i.e., zero-inflated regression). This dataset is associated with the following publication: Morefield, P.E., and T.F. Leslie. County-to-county migration modeling in the United States: the effects of data source and model selection. Journal of Geographical Systems. Springer, Heidelberg, GERMANY, 27(3): 455-472, (2025).