The 2019 Quaker State 400 presented by Walmart was a Monster Energy NASCAR Cup Series race held on July 13, 2019 at Kentucky Speedway in Sparta, Kentucky. Contested over 269 laps – extended from 267 laps due to an overtime finish – on the 1.5-mile (2.4-kilometre) speedway, it was the 19th race of the 2019 Monster Energy NASCAR Cup Series season.

On the final restart, Kurt Busch (Chip Ganassi Racing) worked the outside line to pass erstwhile leader Joey Logano (Team Penske) and his brother Kyle Busch (Joe Gibbs Racing) and held off the latter by 0.076 seconds to win the race – his first victory of the season, and his first for Chip Ganassi Racing – qualifying him for the NASCAR playoffs.

Kentucky Speedway is a 1.5-mile (2.4 km) tri-oval speedway owned by Speedway Motorsports, Inc., which has also hosted the ARCA Racing Series, NASCAR Gander Outdoors Truck Series, NASCAR Xfinity Series, and the Indy Racing League, and has a grandstand seating capacity of 107,000.

Kurt Busch was the fastest in the first practice session with a time of 29.389 seconds and a speed of 183.742 mph (295.704 km/h).

Brad Keselowski was the fastest in the final practice session with a time of 29.621 seconds and a speed of 182.303 mph (293.388 km/h).

Daniel Suárez scored the pole for the race with a time of 29.254 and a speed of 184.590 mph (297.069 km/h).

Stage One Laps: 80

Stage Two Laps: 80