George S. McGill (February 12, 1879 – May 14, 1963) was an American politician who from 1930 to 1939 served as a United States senator from Kansas, and is currently the last Democrat to do so.

He graduated from Central Normal College in Great Bend, Kansas, at the turn of the century and was admitted to the state bar two years later.

Former Governor Henry J. Allen was appointed to fill the seat until a successor was elected.

In the Senate, he was the chairman of the Committee on Pensions and was particularly involved in the Agricultural Adjustment Act.

In 1937, he was considered for a judicial appointment for a seat in United States Court of Appeals for the Tenth Circuit, but declined, opting to seek re-election in 1938.