Frank P. Sillin (May 15, 1903 – December 29, 1932) was an American football player.

[1] He later professional football in the National Football League (NFL) as a back for the Dayton Triangles.

He appeared in 17 NFL games, 12 as a starter, during the 1921, 1927, 1928, and 1929 seasons.

[2] He died in 1932 at age 29 of influenza and pneumonia.

This biographical article relating to an American football running back born in the 1900s is a stub.