Kaynarca, formerly Şeyhler, is a municipality and district of Sakarya Province, Turkey.Büyükşehir İlçe Belediyesi , Turkey Civil Administration Departments Inventory. Retrieved 19 September 2023. Its area is 343 km2, and its population is 24,483 (2022). The mayor is Kadir Yazgan (YRP).
The nature reserve Acarlar Floodplain Forest, which is Turkey's biggest mono-bloc floodplain forest, is located northeast of Kaynarca.
Composition There are 45 neighbourhoods in Kaynarca District:Mahalle , Turkey Civil Administration Departments Inventory. Retrieved 19 September 2023.
Akbaşlı Arifağa Başoğlu Birlik Büyükyanık Cebek Dudu Eğrioğlu Gaziler Gölce Gürpınar Güven Hatipler İmamlar İşaret Kalburcu Karaçalı Karamanlar Kayacık Kertil Kırktepe Kızılcaali Konak Küçükkaynarca Küçükkışla Kulaklı Merkez Mahalle Müezzinler Okçular Ömerağa Orta Mahalle Ortaköy Osmanlı Sabırlı Sarıbeyli Şeyhtımarı Taşoluk Topçu Turnalı Uğurlu Uzakkışla Uzunalan Yeniçam Yeşilova Ziahmet
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