Ivan Yevgenyevich Knyazev (; born 5 November 1992) is a Russian former football defender.
Knyazev made his debut in the Russian National Football League for Torpedo Moscow on 12 March 2013 in a game against Yenisey Krasnoyarsk. He made his Russian Premier League debut for Torpedo on 16 August 2014 in a game against FC Ural Yekaterinburg.
On 15 March 2021, it was reported that FIFA opened an investigation into Knyazev on suspicion of violating anti-doping rules in 2013. On 18 July 2021, he received a two-year ban from playing from FIFA.