Hanna Anatoliïvna Kasyanova (née Melnychenko) (Ukrainian: Ганна Анатоліївна Мельниченко; born 24 April 1983 in Tbilisi, Georgia) is a Ukrainian heptathlete.
Kasyanova won the 2013 Décastar competition with 6308 points.
Kasyanova was married to Italian decathlete William Frullani. Since 2014, she is married to Ukrainian decathlete Oleksiy Kasyanov.
Hanna Melnychenko at World Athletics