Horace L. Calvo January 4, 1927 – June 3, 1991) was an American politician and jurist.

Calvo was admitted to the Illinois bar even though he never had a law degree.

Calvo practiced law in Granite City, Illinois.

From 1989 until his death in 1991, Calvo served on the Illinois Supreme Court.

Calvo died of cancer in a hospital in Saint Louis, Missouri.