George Popham Sewall (April 24, 1811 – December 30, 1881) was an American lawyer and member of the Maine House of Representatives from Old Town, Maine.

[1] Sewall was elected Speaker of the Maine House of Representatives in 1851 - 1852.

His great grandson, Joseph Sewall, later became President of the Maine Senate.

Their son James Wingate Sewall started the forest engineering practice that became James W. Sewall Co. James W. was also an adjunct professor of Sanitary Engineering at MIT (Massachusetts Institute of Technology).

George Sewall died in Old Town on December 30, 1881.