Bursa is located between 40 degrees longitude and 28-30 latitude in the North West of Turkey and to the south east of the Marmara Sea. It is surrounded by Bilecik and Adapazari to the east, Izmit, Yalova, Istanbul and the Marmara Sea to the north, Eskisehir and Kutahya to the south, and Balikesir to the west. Bursa which occupies 11.027 square kilometres has 17 districts ( Buyukorhan, Gemlik, Gursu, Harmancik, Inegöl, Iznik, Karacabey, Keles, Kestel, Mudanya, Mustafakemalpasa, Orhaneli, Orhangazi, Yenisehir, Nilufer, Osmangazi and Yildirim), 230 small towns and 659 villages. In the north the Marmara Sea comprises a 135 kilometres shoreline. According to the results of the poll of the year 2007 the population is 2.439.876.
It has a rich flora with its valleys such as Karacabey, Orhangazi, Iznik, Inegöl, Bursa and Yenisehir; a plateau and low-ridge mountains, Ulubat and Iznik lakes and other small lakes and streams such as Nilufer, Delicay, Goksu and Kemalpasa. 17 per cent of the total land area is covered in valleys. Also Uludag (2543 m) which is the highest mountain of western Anatolia comes within the borders of Bursa. Bursa which is 155 metres above sea level generally has a mild climate. However, the climate shows differences depending on the region. In contrast to the mild and temperate climate of the Marmara Sea in the north, the harsh climate of Uludag is encountered in the south. The hottest months of the city are July-September and the coldest months are February-March.