Vierde Klasse B

The Vierde Klasse B is the fourth tier of the Dutch amateur football league system. It is the lowest amateur league in the South 1 region.

The league is divided into four divisions, each with between 11 and 14 clubs. The clubs play each other twice, once at home and once away. The top two teams in each division are promoted to the Derde Klasse, while the bottom two teams are relegated to the Vijfde Klasse.