Boulct was a French automobile manufacturer that operated briefly in the early 20th century, specifically from 1902 to 1903. The company was based in Paris and was known for producing quadricycles, a type of early automobile characterized by their four wheels and lightweight design.

The Boulct quadricycles were equipped with single-cylinder Aster engines, which offered power outputs of 4, 6, or 8 horsepower. These engines were mounted at the rear of the vehicle and utilized a belt drive system. One notable model was a 6-horsepower quadricycle, which gained attention for its performance in the 1903 Paris-Madrid race, where it was described as "somewhat terrifying" due to its speed and handling characteristics.

Despite its short existence, Boulct contributed to the early automotive landscape in France during a period of rapid innovation and competition among manufacturers.