William L. Grout (1833–1908) was an American industrialist and pioneer manufacturer of sewing machines and automobiles.

Later, White began building steam and gasoline automobiles and became a leading truck manufacturer for decades.

Later, they separated, and Grout founded the New Home Sewing Machine Company in Orange, Massachusetts.

Although quite successful with up to 18 steam vehicles built per week by 1904, William L. Grout disagreed more and more with the way his sons handled business.

William L. Grout died at his home in Greenfield, Massachusetts on April 15, 1908, and was buried at Forest Hills Cemetery in Boston.