Hassel (Weser) is a municipality in the district of Nienburg, in Lower Saxony, Germany.
Hassel may refer to:
Hassel is a German, Danish and Norwegian surname. Notable people with this surname include the following:
The Hassel is a river in the East Harz Mountains in Germany. It flows through several municipalities including Stiege and the town of Hasselfelde. Its sources is located not far from Stiege. After about 10 kilometres (6 mi) it flows into the Hassel Auxiliary Dam and later into the Rappbode Reservoir.