The 1955 Philadelphia municipal election, held on Tuesday, November 8, involved contests for mayor, district attorney, all seventeen city council seats, among other offices. Citywide, the Democrats took majorities of over 130,000 votes, continuing their success from the elections four years earlier. Richardson Dilworth, who had been elected district attorney in 1951, was elected mayor. Victor H. Blanc, a city councilman, was elected district attorney. The Democrats also kept fourteen of seventeen city council seats, losing one district seat while gaining another, and kept control of the other citywide offices. The election represented a further consolidation of control by the Democrats after their citywide victories of four years earlier.