Giovanni Marinelli (18 October 1879 – 11 January 1944) was an Italian Fascist political leader.
Marinelli was born in Adria, Veneto.
A wealthy man, he contributed to Fascist success by financing the March on Rome.
Secretary of the National Fascist Party (PNF), he created the Ceka, a secret police established on the model of the Soviet Cheka.
When the Nazis helped Mussolini re-establish his rule in Northern Italy, as leader of the Italian Social Republic, Marinelli was convicted of treason during the Verona trial of 1944, and executed by firing squad, along with former Foreign Minister Galeazzo Ciano, Marshal Emilio De Bono, Carlo Pareschi and Luciano Gottardi.