The seat of the municipality is in the neighbourhood Cumhuriyet on Marmara Island. The seat of the district governor (kaymakam) is in the neighbourhood Yenimahalle, also on Marmara Island.
The municipal government's headquarters are situated in the Cumhuriyet neighborhood of Marmara Island. Similarly, the district governor's office is located in Yenimahalle, also on Marmara Island.