Plinio Nomellini (Livorno, 1866 - Florence, 1943) was an Italian painter. Nomellini left his hometown of Livorno and enrolled in 1885 at the Florence Academy of Fine Arts, where he studied under Giovanni Fattori and formed friendships with Telemaco Signorini and Silvestro Lega as well as Giuseppe Pellizza some time later. He took part in the Paris Universal Exhibition of 1889 and moved to Genoa, where he adopted Divisionism, the following year.