Rancho Pleyto (also called Pleito) was a 13,299-acre (53.82 km2) Mexican land grant in the Santa Lucia Range, in present-day southern Monterey County, California. It was granted in 1845 by Governor Pío Pico to Antonio Chaves (Chávez). The grant extended along the San Antonio River southeast of present-day Jolon. Much of the grant is under water, inundated by the creation of the San Antonio Reservoir.