The 1978 Giro d'Italia was the 61st running of the Giro d'Italia, one of cycling's Grand Tours races. The Giro started in Saint-Vincent, on 7 May, with a prologue and concluded in Milan, on 28 May, with a mass-start stage. A total of 130 riders from thirteen teams entered the 20-stage race, that was won by Belgian Johan de Muynck of the Bianchi team. The second and third places were taken by Italians Gianbattista Baronchelli and Francesco Moser, respectively. As of the beginning of the 2021 cycling season this was the last time a Belgian rider won a Grand Tour.