Niccoló Zanellato (born 24 June 1998) is an Italian footballer who plays as a midfielder for Serie A club Crotone.
Zanellato is a Milan’s youth academy graduate. He received his first-ever call-up to the senior team from the head coach Vincenzo Montella ahead of the away Serie A game against Cagliari played on 28 May 2017; he, however, remained an unused substitute. He made his UEFA Europa League debut on 24 August 2017 against KF Shkëndija, playing the entire game as Milan won 1-0.
On 30 January 2018, he was signed by Crotone on a six-months loan with an obligation to buy.
He made his debut with the Italy U21 on 6 September 2019, in a friendly match won 4–0 against Moldova.