Katie Feenstra-Mattera, American basketball player
Katharen Ruth Mattera (née Feenstra; born November 17, 1982) is an American college basketball coach and former player for the Women's National Basketball Association (WNBA).

Mattera is one of the tallest players in WNBA history. At 6 feet 7.5 inches (2.02 m) tall, she is the eighth-tallest person to have played professionally in the WNBA. Only Margo Dydek, at 7 ft 2 in (2.18 m), Han Xu, at 6 ft 9 in (2.06 m), and Lindsay Taylor, Zheng Haixia, Maria Stepanova, Liz Cambage, and Brittney Griner, each at 6 ft 8 in (2.03 m), are taller than she.