These places were the largest cities in the Northern States at the time of the Civil War.

1. New York, NY (813,669)
2. Philadelphia, PA (565,529)
3. Brooklyn, NY (266,661)
4. Baltimore, MD (212,418)
5. Boston, MA (177,840)
6. Cincinnati, OH (161,044)
7. St. Louis, MO (160,773)
8. Chicago, IL (112,172)
9. Buffalo, NY (81,129)
10. Newark, NJ (71,941)
11. Louisville, KY (68,033)