Wallerfangen is a municipality located in the Saarlouis district of Saarland, Germany. It is situated to the west of the city of Saarlouis and lies along the border with France.
The municipality serves as the seat for several villages, including Ittersdorf, Ihn, Leidingen, St. Barbara, Kerlingen, Gisingen, Rammelfangen, Oberlimberg, Bedersdorf, and Düren.