Teresa Earnhardt (née Houston) is the widow of Dale Earnhardt and mother of Taylor Nicole Earnhardt (born December 20, 1988). She is the stepmother of Kerry Earnhardt, Kelley Earnhardt Elledge and Dale Earnhardt Jr. She is the president and Chief Executive Officer of Earnhardt Ganassi Racing, thus making her the first woman in NASCAR history to own a team. Her uncle is Tommy Houston who is her father Hal Houston's brother.

She was portrayed by Elizabeth Mitchell in the movie 3: The Dale Earnhardt Story.

Earnhardt won her first Daytona 500 as a team owner when driver of the #15 Chevrolet driven by Michael Waltrip drove his car to a win at the 2001 Daytona 500. This was the race that her husband Dale Earnhardt was killed in a last lap accident.