HUNT2 (1995-1997) was a follow-up to HUNT1, and the questionnaires were similar or identical to the prior ones. HUNT2 however, was a far larger study, with an age span from 13 years upwards, a wider range of topics, and more data collected for each participant.

Around 70,000 people participated in HUNT2, of whom 45,000 had also participated in HUNT1. Clinical monitoring, data management and quality controls were performed after data collection was completed, and since 1998 the data have been available to the research community .