S. Walter Poulshock (February 19, 1929 - February 3, 1997) was an American historian and psychotherapist. As a young assistant professor at Rutgers University, he resigned his position after it was discovered that his 1965 book The Two Parties and the Tariff in the 1880s, among other work, was based on fabricated quotes. The case has been described as one of the most notable examples of academic fraud in American historical research prior to the more widely publicised Arming America case. Poulshock subsequently retrained as a psychotherapist, and practiced in this field until his death in 1997.