Jacob was the son of Adam Bachman and Esther "Hettie" Leiby. He married on June 25, 1871, to Caroline Gehringer. They appear in the 1880 and 1900 census of Lynn Township, Lehigh County, Pennsylvania. He was a farmer.
Children of Jacob and Caroline: Elmer J. Bachman (ca.1872-unk) Clinton A. Bachman (ca.1873-unk) Emma A. Bachman (ca.1875-unk) Ellen S. Bachman (ca.1877-unk) Alice H. Bachman (1878-unk) Anson J. Bachman (1880-unk) Annie G. Bachman (1881-unk) Alfred H. Bachman (1882-unk) Nevin G. Bachman (1888-unk) Edna F. Bachman (1892-unk) Mamie I. Bachman (1894-unk)