Igor Sergeyevich Diveyev (born 27 September 1999) is a Russian football player who plays as centre-back for CSKA Moscow.

Diveyev made his debut in the Russian Premier League for FC Ufa on 26 August 2018 in a game against FC Zenit Saint Petersburg.

On 22 February 2019, Diveyev joined the CSKA Moscow on loan until the end of the 2018–19 season, with an option for the move to be made permanent in the summer of 2019. On 31 May 2019, CSKA Moscow announced that they had exercised their option to make Diveyev's loan deal permanent, signing him to a five-year contract.

In November 2020, he was called up to the Russia national football team for the first time for the games against Moldova, Turkey and Serbia. He made his debut on 12 November 2020 in a friendly against Moldova. He made his competitive debut on 18 November 2020 in a Nations League game against Serbia, Russia allowed 4 goals in the first half and Diveyev was substituted at half-time. After the game he was diagnosed with a concussion and a broken nose that he suffered early in the game but remained on the field.

On 11 May 2021, he was included in the preliminary extended 30-man squad for UEFA Euro 2020.