search across all the following databases:
Data and documentation
Common questions and answers.
Entire collection of data resources.
a PSC Data Resource
Resource Source:Census Bureau
This Web page contains substantial county changes only. This includes all county boundary changes affecting at least an estimated population of 200 plus with additional changes of at least one square mile where no estimated population was provided and research indicated that the affected population may have been 200 people or more or "large" annexations of unpopulated territory (10 square miles or more.)Link:
Boundary Changes (Source: Census Bureau)
server hits: 625