Lassengården is named after Anders Lassen (1920-1945), who was an officer in the British Special Boat Service during World War II. For a short period of time he was a student at Herlufsholm. He was the only foreigner to receive the Victoria Cross, the highest British military order.

Students from the High School and IB Diploma lives and Lassengården. All the students get a single room, fully furnished with locker, work desk, lamp, shelf and sofa. Most students bring a little extra to give a personal touch to the room.

The dorm teachers at Lassengården are Jacob & Josephine Hartmann, both long-time teachers at Herlufsholm and former dorm teachers at Bodilgården.