Arthur George Klein (August 8, 1904 – February 20, 1968) was an American lawyer, jurist, and politician who served eight terms as a United States Representative from New York during the mid-20th century.

He was elected as a Democrat to the Seventy-seventh Congress to fill the vacancy caused by the death of M. Michael Edelstein.

He was not a candidate for renomination in 1944, He was elected to the Seventy-ninth Congress to fill the vacancy caused by the resignation of Samuel Dickstein and then reelected in 1946 to the Eightieth and to the four succeeding United States Congresses and served from February 19, 1946, until his resignation December 31, 1956.

He was elected to the New York State Supreme Court for the term commencing January 1, 1957, and served until his death.

He died in New York City February 20, 1968, and is interred in Mount Moriah Cemetery in Fairview, Bergen County, New Jersey.