The 2009–10 G4S Korvpalli Meistriliiga was the 85th season of the Estonian basketball league and the first under the title sponsorship of G4S.

The season started on 13 October 2009 and concluded on 14 May 2010 with TÜ/Rock defeating Rakvere Tarvas 4 games to 2 in the 2015 KML Finals to win their 25th Estonian League title.

Source: KML Archived 2015-09-23 at the Wayback Machine (2009/2010) The playoffs began on 28 March 2010 and ended on 14 May 2010.

The tournament concluded with TÜ/Rock defeating Rakvere Tarvas 4 games to 2 in the 2010 KML Finals.

Players qualify to this category by having at least 50% games played.