Herrera del Duque (Extremaduran: Herrera del Duqui) is a municipality located in the province of Badajoz, Extremadura, Spain. As of 2010, the municipality has a population of 3681 inhabitants. The town is commanded by a 15th-16th-century fortress-castle. Other sights include the church of St. John the Baptist and the hermitage of Nuestra Señora de Consolación. Historically, there was a Jewish community in Herrera del Duque. After the expulsion of the Jews, many Jews in the town became conversos rather than flee Spain.