James Addison Reavis, later using the name James Addison Peralta-Reavis, the so-called Baron of Arizona, was an American forger and fraudster. He is best known in association with the Peralta land grant, also known as the Barony of Arizona, a pair of fraudulent land claims, which if certified, would have granted him ownership over 18,600 square miles (48,200 km2) of land in central Arizona Territory and western New Mexico Territory. During the course of the fraud, Reavis collected an estimated US$5.3 million in cash and promissory notes through the sale of quitclaims and proposed investment plans.