Claire Decker (born February 22, 1995) is an American professional driver from Eagle River, Wisconsin. Decker was a 2014 participant in the NASCAR Drive for Diversity. She currently competes part-time in the NASCAR Camping World Truck Series, driving the No. 10 for Jennifer Jo Cobb Racing, while also competing part-time in the Xfinity Series, driving the No. 77 Chevrolet Camaro for Obaika Racing.

Decker is the daughter of Allen Decker who comes from a family of snowmobile racing riders. Four Decker brothers raced snowmobiles in the 1970s; Allen Decker was a factory rider for Bombardier along with teammate Jacques Villeneuve for the 1979-80 season. The Decker family raced snowmobiles against the Danica Patrick family during the 1970s. Sue Decker, Claire's aunt, introduced Danica Patrick's parents.

Her sister Paige Decker also races for her family's Decker Racing team. They are joined on the team by their younger cousin NASCAR Drive for Diversity driver Natalie Decker. Natalie's father (and Claire's uncle) is Chuck Decker, the owner of the Eagle River Derby Track which hosts the World Championship Snowmobile Derby.

Decker raced in northern Wisconsin. She moved from Super Stock cars to Super Late models. Decker raced Super Late models in the TUNDRA touring series of Wisconsin in 2013. She has won the 2014 Dick Trickle 99 (+ 1) super late model race at Marshfield Motor Speedway.

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