Louis Frederick Grell (November 30, 1887 – November 21, 1960) was an American figure composition and portrait artist based in the Tree Studio resident artist colony in Chicago.

He received his formal training in Europe from 1900 through 1915 and later became an art professor at the Chicago Academy of Fine Arts from 1916 to 1922, and at the Art Institute of Chicago from 1922 to 1934. Born in Council Bluffs, Iowa to German emigrant meat market owners, and remained until the young age of 12, when in May 1900, his parents decided to send him to Hamburg, Germany to study art. He died while I was in high school and was at The Art Institute at the same time as John Vanderpoel.