Lasse is a common given name in the Nordic countries. It is also often a nickname for people named Lars.
Notable people named Lasse include:
- Lasse Åberg, Swedish actor, musician, film director and artist
- Lasse Gjertsen, a Norwegian animator.
- Lasse Hallström, Swedish film director
- Lasse Holm, Swedish musician, composer, ESC partipicant
- Lasse Kjus, Norwegian former Alpine skier
- Lasse Mårtén, Swedish mixer, engineer and producer
- Lasse Mårtenson, Finnish singer
- Lasse Pöysti, Finnish actor
- Lasse Qvist, Danish football player
- Lasse Rimmer, Danish comedian
- Lasse Thoresen, Norwegian composer and writer
- Lasse Viren Finnish Olympic Champion Distance Runner
- Lasse Wiklöf, politician in the Åland Islands
In places:
- Lasse, Maine-et-Loire, a commune of the Maine-et-Loire department in France
- Lasse, Pyrénées-Atlantiques, a commune of France