The 21st Pau Grand Prix was a non-Championship motor race, run to Formula One rules, held on 3 April 1961 at Pau Circuit, the street circuit in Pau. The race was run over 100 laps of the circuit, and was won by Jim Clark in a Lotus 18. This was Clark's first Formula One victory. The cars entered by Scuderia Centro Sud were fitted with engines that were bigger than the 1.5 litres allowed by the regulations. Lorenzo Bandini had a 2.5-litre engine, and Mário Cabral a 2-litre.