Seymour grew quickly with the addition of the Ohio and Mississippi Railroad in 1854 and soon became the largest city in Jackson County.
Seymour ເຕີບໃຫຍ່ຢ່າງໄວວາ ການເພີ່ມເສັ້ນທາງລົດໄຟ Ohio ແລະ Mississippi ໃນປີ 1854 ແລະບໍ່ດົນກໍ່ກາຍເປັນເມືອງໃຫຍ່ທີ່ສຸດໃນ Jackson County.