Aleksandra Wozniak (born September 7, 1987, in Montreal, Quebec) is a Canadian professional tennis player. She turned professional in November 2005. Wozniak achieved a career-best ranking of no. 21 on June 22, 2009, making her the fourth-highest ranked Canadian singles player of all time. She has won one WTA and nine ITF tournaments. At the Bank of the West Classic in Stanford in 2008, she became the first Canadian in 20 years to capture a WTA singles title and is the only Quebecer in history to have accomplished such a feat. She reached a career-high ITF junior ranking of No. 3 on January 31, 2005. She was named Female Player of the Year by Tennis Canada four times (2009, 2008, 2006, 2004). Wozniak is currently Canada's highest-ranked women's singles player.

Wozniak's family immigrated to Canada from Poland in 1983. She speaks Polish, English and French fluently. She has an elder sister Dorota who, also, plays tennis. Aleksandra started playing tennis at the age of three. She was inspired to pick up a racquet by her sister and Monica Seles, her idol growing up and was coached by her father, Antoni.