Estevan Antonio Fuertes (May 10, 1838 – January 16, 1903) was a Puerto Rican-American civil engineer and professor of astronomy at Cornell University.

From 1870 to 1871, he was chief engineer of the American Isthmian Canal expeditions to Tehuantepec and Nicaragua to investigate and report on the practicability of a ship canal connecting the Caribbean and the Pacific Ocean In 1873, he was appointed founding dean of the Civil Engineering Department of Cornell University, and from 1890 to 1902 directed the Cornell's College of Civil Engineering advancing its research and technical programs to its then "state-of-the-art" modern standard.

On the international plane, Fuertes also is known for his visionary design and comprehensive planning of the drainage systems of Santos, Brazil.

Fuertes died at his home in Ithaca, New York on January 16, 1903, and was buried at Lake View Cemetery.

They had six children: Felix Juan, James Hillhouse, George Perry, Sarah Demetria, Mary Katherine Stamford, and Louis Agassiz.