Francis William Pitt Greenwood (February 5, 1797 - August 2, 1843) was a Unitarian minister of King's Chapel in Boston, Massachusetts.

While in England, Greenwood wrote home and resigned his pastorship at New South Church in June 1821.

In the summer of 1824, he returned to Boston to become associate minister of King's Chapel, serving under his mentor, James Freeman, of whom he would later write his biography.

[2] Greenwood's writings were also published in the Boston Journal of Natural History and The Token and Atlantic Souvenir.

He was also one of the first members of the Boston Society of Natural History and was elected a Fellow of the American Academy of Arts and Sciences.