Peter of Luxembourg (1390 – 31 August 1433) was count of Saint-Pol.

His inheritance included the counties of Brienne, Conversano and Saint-Pol.

Peter was the son of John of Luxembourg, Lord of Beauvoir, and mother, Marguerite of Enghien.

Peter and Margaret had: Peter also had 1 illegitimate child: The Black Death hit Luxembourg, France, England and Spain in the 1340s when it causing the deaths of millions of people; and it continued to re-appear at intervals over the succeeding centuries.

He died at Rambures on 31 August 1433, aged 43 years, and was buried in the abbey at Cercamp, near Frévent.