Trevor Letowski (born April 5, 1977 in Thunder Bay, Ontario) is a professional ice hockey player who currently plays right wing for the Kontinental Hockey League's Barys Astana.

Letowski was drafted in the 7th round, 174th overall by the Phoenix Coyotes in the 1996 NHL Entry Draft. Letowski played junior hockey for the Sarnia Sting of the Ontario Hockey League. The Sting named him Rookie of the Year for the 1994–95 season. Letowski won a gold medal with Team Canada at the World Junior Championships in Switzerland in 1997. A banner depicting his number 10 in Canadian national team colours hangs at the Sarnia Sports and Entertainment Centre in Sarnia, Ontario, where the Sting play.

After his third and final season with the Sting, he spent the 1997–98 season with the Springfield Falcons, Phoenix's American Hockey League affiliate. Letowski made his NHL debut in 1998–99 and became a regular in the Coyotes lineup, playing two full seasons. Midway through the 2001–02 season on December 28, 2001, Letowski was traded by the Coyotes, along with Todd Warriner and Tyler Bouck, to the Vancouver Canucks for Drake Berehowsky and Denis Pederson.