Arthur William Coolidge (October 13, 1881 – January 23, 1952) was a Massachusetts politician who served multiple positions within the state government.

The commission proposed a number of suburban extensions – some of which were built over the following four decades – and created the plans to reform the BERy as the Metropolitan Transit Authority, the predecessor of the modern Massachusetts Bay Transportation Authority.

[2] A Unitarian and Freemason, Coolidge served as Grand Master of Masons (1943–1944) and a member of the American Bar Association and Theta Delta Chi.

In 1951, he was elected as a member of the Massachusetts Society of the Sons of the American Revolution.

Coolidge died at his home in Boston and is buried in Forest Glen Cemetery in Reading, Massachusetts.