Thomas Regan (born September 16, 1977) is an American professional stock car racing driver.

Regan grew up in Southern California, and followed the family tradition of racing Sportsman cars on short tracks in the area.

[1] Receiving funding from Ultra Lube, Regan ran four races in the NASCAR K&N Pro Series West in 2012, three for Mike Holleran and one for Marv Brown.

Regan attempted to make a comeback in 2016, but missed the cut at Texas Motor Speedway with McLeod and at Phoenix International Raceway with Jennifer Jo Cobb Racing.

On April 19, 2017, it was announced that Regan would make his Monster Energy NASCAR Cup Series debut for Rick Ware Racing at Sonoma Raceway that summer.

Prior to making his Cup Series debut in 2017, Regan stated that he wanted a full-time Cup ride by the 2019 season,[1] although this did not end up happening and he has not driven in any NASCAR races since 2018, when he drove in the Truck race at Las Vegas Motor Speedway in the TJL Motorsports No.