Pieter Johan Jozef Maria Custers (born 13 March 1984 in Weert) is an athlete from the Netherlands, who competes in archery.
He was a member of the Dutch junior archery team, that won the European championship in 2001.
The 2004 European championships resulted in a bronze medal for Custers in the individual competition as well as a gold medal in the team competition.
At the 2004 Summer Olympics Custers was defeated in the first round of elimination, placing 44th overall in men's individual archery.
Custers was also a member of the Netherlands' 5th-place men's archery team at the 2004 Summer Olympics.