Çınarcık is a town in Yalova Province in the Marmara region of Turkey. It is the seat of Çınarcık District. Its population is 20,454 (2022).Çınarcık has a permanent population of about 20,000 but its location near Istanbul has made it a popular location for summer homes. On hot weekends during the summer, the population can swell to 300,000 and construction of new summer homes in the town is fast-paced.Çınarcık is located on a small strip of flat land on the coast with mountains rising sharply in back of it.