Denis Alekseyevich Kaykov (; born 12 August 1997) is a Russian football player who plays for FC Volna Nizhny Novgorod Oblast.
He made his debut in the Russian Professional Football League for FC Orenburg-2 on 27 July 2017 in a game against FC Chelyabinsk.
He made his Russian Football National League debut for FC Neftekhimik Nizhnekamsk on 13 July 2019 in a game against FC Nizhny Novgorod.
He made his Russian Premier League debut for FC Tambov on 7 March 2021 in a game against FC Dynamo Moscow.