Slavery in the American Colonies and the United States (1630-1860)

Data is taken from: , , and .

Colonized borders based on (the Atlas of Historical County Boundaries). Created in QGIS.

This data sometimes list slaves in areas where slavery had been explicitly made illegal (the area of the Northwest Territory especially). The numbers are quite small and I don’t know if they indicate an error by the census takers, or if some people were living with their slaves beyond the reach of the law.