Guelders or Gueldres (Dutch: Gelre, German: Geldern) is the name of a historical county, later duchy in the Low Countries.The duchy was named after the town of Geldern, which is now in Germany. The present province of Gelderland (English also Guelders) in the Netherlands occupies most of the area of the former duchy.[hotels]

The county and duchy of Guelders consisted not only of parts of the actual Dutch provinces of Gelderland and Limburg but also part of the present-day German state of North Rhine-Westphalia.