John Milton Earle (April 13, 1794 – February 8, 1874) was an American businessman, abolitionist, and politician who founded the Massachusetts Horticultural Society in 1829.

He was a member of the Massachusetts General Court, or state legislature, for several years, serving in both the House of Representatives (1844–1846 and 1850–1852) and the Senate (1858).

[1] He was also a city alderman, postmaster, state commissioner on Indian affairs, and founder of the Massachusetts Horticultural Society.

Sarah married John Milton Earle on June 6, 1821 in Nantucket before moving to Worcester, Massachusetts.

Her obituary notice in the Worcester Spy said, "Aside from her own family circle, no one has cause to mourn more deeply than the slave, for whose interests her labors were untiring.