Juan Vallejo Corona (February 7, 1934 – March 4, 2019) was a Mexican serial killer who was convicted of the murders of 25 transient laborers found buried in peach orchards along the Feather River in Sutter County, California, in 1971. Corona was considered the most prolific serial killer in U.S. history until the discovery of Dean Corll's crimes two years later. He remains the most prolific serial killer in the state of California.
Corona was convicted of 25 counts of first-degree murder in 1973. An appellate court overturned the conviction in 1978 on the basis of incompetent legal representation and granted him a new trial. In 1982, he was again found guilty on all counts. He served a life sentence in California State Prison, Corcoran, and died in 2019.