becoming the second harbour for Bremen, despite being 50 km 0 abbr=on downstream. Due to trade with, and emigration to, North America, the port and the town grew quickly. In 1848, Bremerhaven became the home port of the German Confederation's Navy under Karl Rudolf Brommy.

The Kingdom of Hanover founded a rival town next to Bremerhaven and called it Geestemünde (1845).