Yıldırım, which is located at the foot of the Mt. Uludağ is 399 square kilometers (km²) and 150-155 metres in elevation. Kestel and Gürsu are located west of Yıldırım, and Demirtaş, a subdistrict of Osmangazi, lies to the north. South of Yıldırım is Mt. Uludağ and to the north are relatively flat lands. The Bursa-Ankara highway passes through the Yıldırım district.