Orrin S. Peck was born around 1830 in New York to Philip and Roby Peck. His father was a farmer who owned $800 of real estate and $300 of personal property by 1860. The family lived in New Berlin, New York, and by 1860, he was also working as a farmer. He married a woman named Catherine around 1862, and they had at least two children: Daniel, born around 1865; and William, born around 1875. He worked as a farmer in New Berlin, and he died sometime after 1900.