Ykköspesis
| Formerly | Ykkössarja |
|---|---|
| Sport | Pesäpallo |
| Founded | 1991 |
| Owner | Pesäpalloliitto |
| No. of teams | 12 (men) 17 (women) |
| Country | Finland |
| Most recent champions | Koskenkorvan Urheilijat (men) Oulun Lippo Naiset (women) |
| Broadcaster | Nelonen Media |
| Level on pyramid | 2 |
| Promotion to | Superpesis |
| Relegation to | Suomensarja (pesäpallo) |
| Domestic cup | Pesäpallon Suomen Cup (defunct) |
| Official website | ykkospesis.fi |
Ykköspesis (lit. 'First pesäpallo') is the second-highest level of the Finnish pesäpallo league system. Seasons usually run from May to late August or early September. There are separate leagues for men (Miesten Ykköspesis), women (Naisten Ykköspesis), under-19 boys and under-19 girls (Nuorten Ykköspesis).
The league was founded as Ykkössarja in 1981 as the new second-tier league, a status previously held by the Suomensarja, which instead became the third tier. It got its current name Ykköspesis in 1991.
The reigning champions as of after the 2025 season are Koskenkorvan Urheilijat (men) who won the best-of-5 final against Puna-Mustat 3 games to 1, and Oulun Lippo Naiset (women) who won the best-of-3 final against Haminan Palloilijat 2 games to none.
Since the league system uses promotion and relegation, Ykköspesis is not a minor league as such. Reserve teams are allowed to play in Ykköspesis if they are promoted to it from Suomensarja (provided their A teams play in Superpesis at the time), and 3 such reserve teams played in the 2025 Ykköspesis season.