Lewis William Riess (October 19, 1887 – January 4, 1946) was an American football, basketball, and baseball coach and college athletics administrator.

Riess was also the head basketball coach at Hampden–Sydney from 1908 to 1912, amassing a record of 3–6, and the head baseball coach at VPI in 1912, tallying a mark of 9–9.

Riess left Randolph–Macon in December 1917 to become the athletic director of a United States Army aviation camp in Jacksonville, Florida.

[1] He served as the activity secretary of the Army-Navy YMCA in Honolulu from 1938 to 1941.

[2] # denotes interim athletic director # denotes interim head coach This biographical article relating to a college football coach first appointed in the 1910s is a stub.