The EHF Women's Champions League 2009/10 was the 17th edition of the EHF Women's Champions League, a handball competition for top women's clubs of Europe managed by the European Handball Federation. It was won by Danish club Viborg HK who defeated Romanian CS Oltchim Râmnicu Vâlcea at the finals with an aggregate score of 60–52. It was the third title for Viborg and the sixth for a Danish team.
A total of 30 teams participated in the 2009/10 Champions League, from 22 EHF federations. Each nation received a number of slots according to the 2008 ranking. The first 24 nations were allowed to participate in the tournament with their national champion (Iceland has not registered a team). The nations ranked 1 to 7 received an additional slot, as well as the defending champion's federation (Denmark).
Since Viborg HK, 2009 title holder, qualified through domestic league placement, the defending champion wild card was awarded to FCK Handball.
On 19 June 2009, Macedonian champion Kometal withdrew from the tournament due to economic problems. As a consequence, the EHF promoted French champion Metz from Qualification Tournament 2 to Group Matches, and Greek champion Ormi Patras from Qualification Tournament 1 to Qualification Tournament 2.