The 2020 Men's Ice Hockey World Championships would have been the 84th such event hosted by the International Ice Hockey Federation. Teams would've participated in several levels of competition, including the inaugural competition in the newly created Division IV. The competition would also have served as qualifications for division placements in the 2021 competition.
Restructuring by the IIHF led to several changes in the lower divisions of the 2020 World Championships. Division III was renamed Division III-A, the Division III qualification tournament was renamed Division III-B, and Division IV was created, with the latter two tournaments consisting of four teams each instead of the standard six. The bottom two teams in the 2019 Division III qualification tournament were assigned to the new Division IV, along with newcomers Malaysia and the Philippines.
All tournaments were cancelled due to the COVID-19 pandemic.
Championship (Top Division)
- Belarus – Promoted from Division I-A
- Czech Republic
- Great Britain
- Kazakhstan – Promoted from Division I-A
- Switzerland – Host
- United States
- Austria – Relegated from Top Division
- France – Relegated from Top Division
- Romania – Promoted from Division I-B
- South Korea
- Lithuania – Relegated from Division I-A
- Serbia – Promoted from Division II-A
- Israel – Promoted from Division II B
- Netherlands – Relegated from Division I B
- Belgium – Relegated from Division II A
- Bulgaria – Promoted from Division III
- New Zealand
- Chinese Taipei
- North Korea – Relegated from Division II B
- United Arab Emirates – Promoted from Division III A
- Steiss, Adam. "2020 IIHF Ice Hockey World Championship cancelled". iihf.com. IIHF. Retrieved 21 March 2020.
- "Tournaments for 2020 assigned". iihf.com. 24 May 2019.
- "IIHF cancels Division I tournaments". iihf.com. 17 March 2019.
- "World Championships". IIHF. Retrieved 24 May 2019.
- "Men's Division II, III cancelled". IIHF. Retrieved 13 March 2020.
- "IIHF cancels March tournaments". iihf.com. 2 March 2020.