The Los Alfaques disaster was a road accident and tanker explosion that occurred on 11 July 1978 in Alcanar, near Tarragona, in Spain. The tanker truck was loaded with 23 tons of highly flammable liquefied propylene. 217 people (including the driver) were killed and 200 more severely burned.

Most of the victims were vacationers (both Spanish and foreign tourists) in the Los Alfaques seaside campsite. The campsite is located at km 159 on the N-340 national road, 2 km south of the town of Sant Carles de la Ràpita. It has been renovated since and still exists today.