Plinio Nomellini (Livorno, 1866 - Florence, 1943) was an Italian painter. Nomellini was born in Livorno in 1866. In 1885 he enrolled 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.
He exhibited a piece inspired by the Genoese workers’ strikes at the 1st Brera Triennale in 1891 and was arrested on charges of anarchism in 1894.