Teri MacDonald-Cadieux (born November 8, 1963) is a Canadian racing driver. Sister of NASCAR Winston Cup Series driver Randy MacDonald, she is currently retired from competition; she has competed in the past in NASCAR Craftsman Truck Series and CASCAR competition.

Born in Whitby, Ontario on November 8, 1963, during the 1990s MacDonald was a member of the PPG Pace Car Team, a group of professional drivers who drove the pace car at IndyCar events. She also drove in competition in sports cars, including the IMSA series. An accident at Road Atlanta in 1997 nearly ended her career; MacDonald suffered a broken neck, and she was forced to wear a halo to stabilise her head and neck.

Following her recovery, MacDonald returned to sports car racing; in 2000, she moved to stock cars, competing in the American Speed Association's National Tour before joining the CASCAR Super Series, Canada's top stock car series, for the 2001 season. She finished 14th in points, scoring two top 10 finishes over the course of the year.

MacDonald made her debut in NASCAR's national touring series in 2002, in the Craftsman Truck Series at Memphis Motorsports Park. Randy MacDonald also competed in the race, making the siblings the first brother-sister combination to compete against each other in a top-level NASCAR race since Tim Flock and Ethel Flock Mobley in 1949.

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