Kasey Keller (born November 29, 1969 in Olympia, Washington), is a football (soccer) goalkeeper, one of the first American goalkeepers to become a starter in the English FA Premier League.

Keller played his college career at the University of Portland and got his first cap against Colombia on February 4, 1990. After being a non-playing squad member of the US National Team in the 1990 World Cup, he was signed by the English club Millwall, playing there and becoming a fan favorite between 1992 and 1996. Keller then went up to the Premiership, signing with just-promoted Leicester City and promptly led them to the League Cup in 1997. After being ignored by US coach Bora Milutinovic for the 1994 World Cup, he made Steve Sampson's ill-fated squad in 1998, and played two games at the World Cup.

Kasey was named U.S. Soccer Athlete of the Year in 1997 and 1999. In 2000, Keller signed with the Spanish club Rayo Vallecano and played there for two years. He came back to England and the Premier League in 2001, signing with Tottenham Hotspur. Relegated to backup duty for Neil Sullivan early on, he won the starting spot, and played every minute for Spurs in both the 2002-03 and the 2003-04 seasons. Keller was second choice to Brad Friedel in the 2002 World Cup. He has earned 75 caps for the US and is the team's all-time leader in wins and shutouts.

In the 2004-05 Premiership season, Keller fell out of favor at Tottenham as Paul Robinson became the starter. In November 2004, Kasey was loaned out to Southampton, a Premiership club ravaged by injuries to its goalkeeping corps, for one month.

On January 15 2005 Keller joined German Bundesliga side Borussia Mönchengladbach on a free transfer. He got off to a good start in the Bundesliga, keeping a clean sheet in his first appearance for Borussia.