Amos was a laborer. He became free at the age of 21, as per his enslaver's will. In 1805 and 1806, Amos purchased land in West Hatfield, Massachusetts, from his brother Jonah, and that same year he married Melita Paine in South Deerfield, Massachusetts. He was sued four times between 1807 and 1823, and in 1826, he spent two months in jail for criminal assault. By 1844, the Newports were living in Amherst, Massachusetts. Amos sold his Hatfield land in 1851, and he and Melita filed for divorce in 1856. Three years later, Amos died in Amherst of old age.