Hal Jacobs (c. 1860-1933) was a cobbler in Washington, DC and a US spy during the Great War. He was highly placed in Bill Reach's spy ring. He was a friend and comforter of the often-distressed Nellie Semphroch, whose coffee shop was located across the street from his shoe repair store. Jacobs convinced Semphroch, whose coffee shop was popular with Confederate officers, to participate in the spy ring.