Oleksiy Oleksiyovych Bykov (; born 29 March 1998) is a Ukrainian professional footballer who plays as a centre-back for II liga club Chojniczanka Chojnice.
He made his Ukrainian Premier League debut for Mariupol on 18 March 2018 in a game against Shakhtar Donetsk.
On 18 July 2022, he joined Polish I liga club Zagà ÂÃÂbie Sosnowiec on a loan until the end of the season, with an option to buy. He joined the club on a permanent basis on 4 July the following year, signing a one-year contract. In April 2024, he underwent a ligament reconstruction procedure after suffering a PCL injury. In spite of this, and the club's relegation to the third division, Bykov's contract was extended for another year on 15 June 2024. He was released by Zagà ÂÃÂbie at the end of June 2025.
On 27 June 2025, Bykov agreed to a season-long deal with II liga club Chojniczanka Chojnice.