Canadians Stephanie Dubois and Valerie Tetreault also were named wild cards for the event, which begins Saturday with a field of 56 players.
Clijsters, 26, the 2005 Rogers Cup champion, recently returned to competition after an absence of more than two years.
"So many things have changed," Clijsters said. "I got married, had a daughter, and that's something that has a big impact on my life. It will change me as a player as well."