Mestis
| Upcoming season or competition: 2025-26 Mestis season | |
| Formerly | I-Divisioona |
|---|---|
| Sport | Ice hockey |
| Founded | 2000 |
| Founder | Finnish Ice Hockey Association |
| First season | 2000–01 |
| Motto | Suomen viihdyttävintä lätkää (Finland’s most entertaining hockey) |
| No. of teams | 10 |
| Country | Finland |
| Most recent champion | Jokerit (2024–25) |
| Most titles | Jukurit (7) |
| Broadcaster | C More |
| Level on pyramid | Level 2 |
| Promotion to | SM-liiga |
| Relegation to | Suomi-sarja |
| Domestic cup | Finnish Cup |
| Related competitions | Naisten Mestis |
| Official website | Mestis.fi |
Mestis (from Finnish: Mestaruussarja, meaning 'Championship series', stylized as MEST1S) is the second-highest men's ice hockey league in Finland. The league was established by the Finnish Ice Hockey Association in 2000 to replace the I-divisioona ('First Division').
Promotion to the SM-liiga is achievable for a Mestis team if it defeats an SM-liiga club in the qualification series and meets all the criteria established by the SM-liiga. However, Mestis is an open league that allows for relegation and promotion with the third league, Suomi-sarja.
Mestis is also the highest league under the governance of the FIHA.