Cyrus Pitt Grosvenor (October 18, 1792 – February 11, 1879) was an American Baptist minister known for his anti-slavery views.

[1] In his retirement he worked on a famous mathematics problem and took out a patent to prevent lamp explosions.

[5] Grosvenor and Elon Galusha were the two leading Baptist ministers opposing slavery at the time.

dignitary of his own denomination, ...that abolition ministers would soon be silenced, amid scenes of blood, if they could not otherwise be reduced to quietness.

[8] In 1840 he attended the first World Anti-Slavery Convention in London, where he was included in the commemorative painting by Benjamin Haydon, although Grosvenor's face is obscured by Galusha and Henry Sterry.

[9] Grosvenor was the founding editor of the Baptist Anti-Slavery Correspondent, which was first published in February 1841 in Worcester, Massachusetts.

Their son Cyrus Pitt Daniel Grosvenor (1828–1849), born in Utica, New York was a printer.

[12] In 1867, Grosvenor applied for a patent for an idea he had to prevent lamps from exploding by using a reservoir of nitrogen.

[13] The following year Grosvenor published a study in mathematics relating to the problem of squaring the circle.