Harold Marsh Sewall (January 3, 1860 – October 28, 1924) was an American politician and diplomat.

Harold M. Sewall
United States Minister to Hawaii
In office 1897 – August 12, 1898
President	William McKinley
Preceded by	Albert Sydney Willis
Personal details
Born	(1860-01-03)January 3, 1860 Bath, Maine, U.S.
Died	October 28, 1924(1924-10-28) (aged 64) New York City, New York, U.S.
Resting place	Oak Grove Cemetery Bath, Maine, U.S.

Sewall was born in Bath, Sagadahoc County, Maine. He was the son of Arthur Sewall. Sewall served in the Maine House of Representatives, 1896, and from 1903 to 1907; he was a delegate to Republican National Convention from Maine, 1896. He was the last United States Minister to Hawaii, arriving in 1897 to the Republic of Hawaii after the death of Albert Sydney Willis, and returning in 1898 after annexation formed the Territory of Hawaii. He was a member of the Maine State Senate, from 1907 to 1909 and was a candidate for the United States representative from Maine 2nd district, 1914; member of Republican National Committee from Maine, 1924. He died in a hospital at New York City. His interment was at Oak Grove Cemetery, Bath, Maine.^[1][2]

• Works by or about Harold M. Sewall at the Internet Archive