| Sam C. Costen | |
| Birth Date: | 18 May 1882 |
| Birth Place: | McKenzie, Tennessee, U.S. |
| Death Place: | Memphis, Tennessee, U.S. |
| Player Years1: | 1906–1908 |
| Player Team1: | Vanderbilt |
| Player Positions: | Quarterback |
| Coach Years1: | 1909–1910 |
| Coach Team1: | The Citadel |
| Coach Years2: | 1911–1912 |
| Coach Team2: | Vanderbilt (assistant) |
| Coach Years3: | 1913–1919 |
| Coach Team3: | Blytheville HS (AR) |
| Overall Record: | 7–7–2 (college) |
| Awards: | 2× All-Southern (1906, 1907) |
Samuel Cutter Costen[1] (May 18, 1882 – January 21, 1955)[2] was an American football player and coach. Costen was a quarterback for Dan McGugin's Vanderbilt Commodores of Vanderbilt University. As a player, he weighed some 150 pounds. He was the third head football at The Citadel, serving two seasons, from 1909 to 1910, and compiling a record of 7–7–2.[3] He also coached in .
Costen graduated from Vanderbilt in 1908 with an LL.B. degree.[4] He was a member of Alpha Tau Omega.[5]
Costen was the first head football coach at Blytheville High School in Blytheville, Arkansas, leading the team from 1913 to 1919. He died on January 21, 1955, in Memphis, Tennessee, where he had lived in the 1930s.[6]