2009–10 Slovak First League

The 2009–10 season of the Slovak First League (also known as 1. liga) is the seventeenth season of the league since its establishment. It began in late July 2009 and ended in May 2010.

Team changes from 2008–09

 * Promoted in Corgoň Liga: ↑Senica×↑
 * Relegated from Corgoň Liga: ↓Zlaté Moravce↓
 * Promoted in 1. liga: ↑Púchov↑, ↑Dolný Kubín↑, ↑Liptovský Mikuláš↑
 * Relegated from 1. liga: ↓Humenné↓, ↓Košice ↓, ↓Dunajská Streda ↓

× - Senica merged with Inter Bratislava