Emily Clarissa Blackman (1826–1907) was an American schoolteacher and historian from Susquehanna County, Pennsylvania. Her teaching career began at the Montrose Academy at the age of fifteen; during her life, she taught in several states. She also published a book of Susquehanna County history in 1873. Blackman was an active Presbyterian and was active in several organizations, including the Women's Christian Temperance Union.