Allart Pieter van Jongestall, also spelled Allard Pieter van Jongestal (12 August 1612 in Stavoren – 9 November 1676 in Hallum) was a Dutch jurist and diplomat. He was president of the Hof van Friesland (High Court of the province of Friesland) and represented the States-General of the Dutch Republic in the negotiations of the Treaty of Westminster (1654) and the Treaty of Breda (1667) which ended the first two Anglo-Dutch Wars.