Nelson Gordon Bigelow (April 22, 1840 – November 4, 1892) was a Canadian lawyer and political figure in Ontario.
He was born in Tecumseh Township, Simcoe County, Upper Canada in 1840, the son of Hiram Bigelow, and studied at Victoria University in Cobourg.
In 1874, he married Minerva Edna, the daughter of Delino Dexter Calvin.
Bigelow was elected to the provincial legislature in an 1892 by-election held after the death of Henry Edward Clarke.
In 1879, Bigelow and Dalton McCarthy successfully defended Emily Stowe, a female physician generally thought to be the first white female to practice medicine in Canada, against charges of attempting to procure an abortion.