Charles Walter Hart (July 6, 1872 — March 14, 1937) was an American mechanical engineer, inventor, and businessman.
Together with Charles Henry Parr, he founded a company that produced a commercially successful line of gasoline-powered tractors.
Despite owning three farms near Charles City, Iowa, Hart's father considered his son's experiments "folly".
This company supplied gas and petroleum products to the ten filling stations owned by Hart.
His home from 1914 through 1918, the Charles Walter Hart House, is on the US National Register of Historic Places.