Julius Aloysius Arthur Nieuwland, CSC, (14 February 1878 – 11 June 1936) was a Belgian-born Holy Cross priest and professor of chemistry and botany at the University of Notre Dame, Indiana.

He is known for his contributions to acetylene research and its use as the basis for one type of synthetic rubber, which eventually led to the invention of neoprene by DuPont.

As a young man, Nieuwland enrolled at the University of Notre Dame, where he studied Latin and Greek and received his undergraduate degree in 1899.

Ordained in 1903, Nieuwland attended graduate school at The Catholic University of America, where he studied botany and chemistry.

[2] Among Nieuwland's more famous students was Knute Rockne, who became a celebrated Notre Dame football coach.