José Carlos Millás (January 22, 1889 – November 28, 1965) was a Cuban meteorologist.
He is known for his research on past Atlantic hurricane seasons, and has been called one of the "fathers of tropical meteorology".
In the 1930s, before radar and refined hurricane-tracking equipment was available, Millás collaborated with R. W. Gray and Grady Norton of the Weather Bureau to plot the course of tropical cyclones.
Millás remained in that position at the National Observatory until 1961, when the Cuban Revolution forced him to emigrate to the United States.
He became an assistant professor at the University of Miami and conducted research for the Weather Bureau until his death in 1965.