Robert Dietrich (25 July 1986 – 7 September 2011) was a professional ice hockey defenceman. He was killed in the Lokomotiv Yaroslavl plane crash, in which all players and coaches on board the plane from the club perished.
Dietrich was drafted 174th overall in the sixth round of the 2007 NHL Entry Draft by the Nashville Predators. He played with the DEG Metro Stars of the DEL from 2005 to the 2008. On 16 July 2007, Dietrich was signed to a three-year entry level contract with the Predators. He was reassigned on loan to the Metro Stars for his first year of the contract, before he spent the final two seasons in North America with the Predators American Hockey League affiliate, the Milwaukee Admirals.
In his second year with the Admirals in 2009–10, Dietrich led the team with 43 points for defenseman, but was unable to appear in the NHL with Nashville. On 8 June 2010, Dietrich returned to Germany and signed a two-year contract with Adler Mannheim.