The Knox Automobile Company was a manufacturer of automobiles in Springfield, Massachusetts, United States, between 1900 and 1914. Knox also built trucks and farm tractors until 1924. The Knox Automobile Company was established in 1900 and built 15 cars their first year. The 1904 Knox was a runabout model. The angle iron-framed car weighed 1850 lb (839 kg) and used side springs. It could seat 2 passengers.