Ankara is mostly in the Central Anatolia region, and partly in the Black Sea region. Ankara has mountain forests to its north, and the dry plain of Konya to its south. The province is irrigated by the Kızılırmak and Sakarya River systems, the Sarıyar reservoir and many natural lakes and pools. 50% of the land is used for agriculture, 28% is forest and another 10% is meadow and grazing land. Lake Tuz, the second largest lake in Turkey, partly lies in the Şereflikoçhisar district of the province. The highest point of the province is the 2,015 meters tall Işık Mountain in the Kızılcahamam district.
The climate is hot and dry in summer, rainy in spring and autumn, cold and snowy in winter, wetter in the north of the province than the drier plains to the south. The annual precipitation in the city of Ankara located the center of the province is 415 mm, the annual precipitation of Kızılcahamam located in the north of the provice is 592 mm, and the annual precipitation of Şereflikoçhisar located in the southeast of the province is 357 mm.