Erenler is a municipality and district of Sakarya Province, Turkey. Its area is 136 km<sup>2</sup>, and its population is 92,249 (2022). It covers the southeastern part of the agglomeration of Adapazarñ and the adjacent countryside.
Erenler is a part of Adapazarñ city. It is situated slightly to the east of the urban fabric. Sakarya River flows within the municipality. The average elevation of the settlement is about above mean sea level.
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 ðzmit earthquake. Soon after the disaster, the town continued its growth, and it merged to the province capital. In 2008, the district Erenler was created from part of the former central district of Adapazarñ/Sakarya Province, along with the districts Adapazarñ, Arifiye and Serdivan.
There are 33 neighbourhoods in Erenler District: