Nahum Josiah Bachelder (September 3, 1854 – April 22, 1934) was the 49th governor of New Hampshire from 1903 to 1905. He was a farmer and Republican politician from East Andover, New Hampshire, United States. Bachelder lived at and operated his family farm throughout his life, was a leader in the Grange, and served a single term as Governor of New Hampshire.