John William Clark Watson (February 27, 1808 – September 24, 1890) was a Confederate politician and judge.
Watson was born in Albemarle County, Virginia. He served as a senator from Mississippi in the Second Confederate Congress fpom 1864 to 1865. He later served as a state court judge in Mississippi from 1876 to 1882. His wife was Katherine Davis Watson whom he had at least one son with.