During the Ottoman Empire era, Erenler was a village. Between 14 March 1921 and 21 June 1921 the village saw occupation by the Greek army. During the Republican era, the population of the village increased and consequently it became a seat of township in 1963. In 1999 Erenler suffered from the İzmit earthquake. Soon after the disaster, the town continued its growth, and it merged to the province capital. However, in 2008 it became an ilçe (district) center of Sakarya Province.