Mary Coombs Greenleaf

Mary Greenleaf (1800-1857) was an American missionary to the Chickasaw tribe late in her life.

Greenleaf grew up in in Newburyport, Massachusetts, and moved to Andover, Massachusetts, in 1836. Later, she moved to Oklahoma where she worked with the Chickasaw tribe. Before that, she served her local communities for many years by teaching Sunday school. Less than a year after arriving in Oklahoma, while caring for several Native American girls who had dysentery, Greenleaf herself contracted the disease and died on June 26, 1857.

Greenleaf's memoir was compiled a year after her death for the Massachusetts Sabbath School Society. It contains a notable example of her local outreach for the church and the spirit, which led to her missionary life.