Stacia Fonseca (born September 21, 1985) is an American former professional tennis player.
The daughter of a minister, Fonseca was born in Springfield, Massachusetts, but grew up in Connecticut and Florida.
Fonseca made all of her WTA Tour main draw appearances in doubles and reached the quarter-finals at Cincinnati in 2005. Her only ITF title came in the doubles at the 2007 Hilton Head event.