Hanna Anatoliïvna Kasyanova (née Melnychenko) (; 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.