The 2008–09 CONCACAF Champions League was the 44th edition of the premier association football club competition organized by CONCACAF, the regional governing body of North America, Central America, and the Caribbean. This was the first iteration of the competition to be known as CONCACAF Champions League, having been previously known as the CONCACAF Champions' Cup.

The championship began on August 26, 2008, and it concluded on May 12, 2009. Atlante of Mexico won the championship after defeating Cruz Azul, also from Mexico in the final. As champions, they represented CONCACAF in the 2009 FIFA Club World Cup.

24 teams from 13 nations participated in the 2008–09 CONCACAF Champions League from the North American, Central American, and Caribbean zones. Nine of the teams came from North America, twelve from Central America, and three from the Caribbean. Below is the qualification scheme for the 2008-09 competition:

Teams in bold qualify directly for the group stage.

¹ New England was both the 2007 U.S. Open Cup winners and the 2007 MLS Cup runners-up, so Chivas USA claimed USA4 as the 2007 MLS Supporters' Shield runners-up.

² Saprissa was both the 2007 Invierno and 2008 Verano winners, so Alajuelense has claimed CRC2 as the 2008 Verano runners-up.

³ Luis Ángel Firpo was both the 2007 Apertura and 2008 Clausura winners, so Isidro Metapán has claimed SLV2 as the 2008 Clausura runners-up.

⁴ San Francisco was both the 2007 Clausura and 2008 Apertura winners, so Tauro has claimed PAN2 as the 2008 Apertura runners-up.