Violetta Vitalyevna Kolobova (; born 27 July 1991) is a Russian right-handed épée fencer, 2012 team European champion, two-time individual European champion, two-time team world champion, two-time Olympian, and 2016 team Olympic bronze medalist.
Kolobova took up fencing in 2001, encouraged by her mother. She married fellow Russian Olympian Roman Vlasov in 2019.