Serghei Covalciuc (Ukrainian: Сергій Сергійович Ковальчук, romanized: Serhiy Serhiyovych Kovalchuk; born 20 January 1982) is a Moldovan former footballer.

[3] On 23 February 2010, Tom Tomsk signed Covalciuc on a free transfer and on a two-year deal.

[4] After playing for half-a-season for FC Zhemchuzhina-Sochi in the Russian First Division in 2011, Covalciuc transferred to his home-city team Chornomorets Odesa in the Ukrainian Premier League on 29 August 2011.

Covalciuc made 41 appearances for the Moldovan senior squad,[1] including three games in UEFA Euro 2008 qualifying.

He also played eight games in 2006 FIFA World Cup qualification (UEFA) and was a member of 2002 edition.