Jacob Lassen (born 11 September 1995) is a Danish handball player for HSV Hamburg and the Danish national team.
Lassen started his career at the local club Randers HH. In 2016 he won the Danish 1st Division. He then signed for Bjerringbro-Silkeborg HÃÂ¥ndbold. In the 2017-18 and 2020-21 seasons he finished 2nd in the Danish league with BSH. In the 2022-23 season he was included in the Danish League all-star team.
He made his debut on the Danish national team on 28 April 2021, against Switzerland.
On 26 October 2021, it was announced that Lassen had signed a contract with German HSV Hamburg.
From the 2026-27 season he will join Rhein-Neckar Löwen.