莱苏姆河是德国的河流，位于该国北部，属于威悉河的左支流，河道全长10公里，流域面积2,188平方公里，发源自里特鲁德附近，河口处在埃尔斯夫莱特，平均流量每秒23米。

The Lesum is a 10-kilometre (6 mi) long river in northern Germany, right tributary of the Weser. It is formed at the confluence of the rivers Wümme and Hamme, near Ritterhude, northwest of Bremen. It flows west and flows into the Weser in Bremen-Vegesack.