Another 466 were injured, Moussa Niang, a spokesman for the national emergency services, told AFP.
He said nearly 100 traffic accidents had been recorded in which 12 people were killed, adding that another girl lost her life by falling into a ditch.
The accident toll on the road to Senegal's second largest city Touba, the spiritual home of the Mouride Brotherhood where the event was held Tuesday, was similar to last year's.
The Magal festival draws millions of pilgrims from within Senegal and abroad.