Sjoerd Wiarda

Sjoerd Pijbes Wiarda (in office 1399–1410) was the fifteenth potestaat of Friesland (or elected governor) now a province of the Netherlands.

He was the son of Pybe Wyarda and Claer van Eminga.

In 1398 he was a delegate to the convention with Willem van Beijeren, Count of Holland.

He was elected in 1399, succeeding Odo Botnia as potestaat.

In 1400 there were several potestaats chosen for Oostergo and Westergo because of the religious disputes between Schieringers and Vetkopers.