1951 South Dakota Mines Hardrockers football team

The 1951 South Dakota Mines Hardrockers football team was an American football team that represented the South Dakota School of Mines and Technology as a member of the South Dakota Intercollegiate Conference (SDIC) during the 1951 college football season. Led by Marvin Lewellyn in his fifth and final season as head coach, the Hardrockers compiled a perfect overall record of 8–0 with a mark of 6–0 in conference play, winning the SDIC title. They held opponents to seven or fewer points in seven games, including four shutouts, and outscored all opponents by a total of 158 to 34. Right halfback Doug Blackwell and center Ralph Teslow were selected as the team's co-captains. The team played its home games at O'Harra Stadium in Rapid City, South Dakota.

The 1951 team was inducted as a group in 2006 into the South Dakota Mines Athletic Hall of Fame.