Adıyaman şehrinin 35 km doğusunda yer alan Kâhta, doğu ve güneydoğu sınırları boyunca Fırat Nehri uzanır. Yüz ölçümü 1490 km2, Rakımı ise 750 metredir. Kâhta\'nın kuzey ve güney kesimi engebeli bir araziye sahiptir. Şehir düz bir alana kurulmuştur. Güneydoğu Toroslar silsilesi üzerindeki Nemrut Dağı 2150 metre, Narince Kasabasının kuzeyinde ise Anka Dağı 2206 metre ile ilçenin önemli dağlarındandır. İlçenin en önemli nehri Fırat Nehridir. Tarihî köprülerinden olan Cendere Köprüsü, Kâhta Çayı üzerinde bulunur. İlçenin güneyindeki önemli arazi Atatürk Baraj Gölü suları altında kalmıştır. Turizm bakımından oldukça zengin bir ilçemizdir. Kâhta Kalesi, Cendere Köprüsü, Karakuş ve Nemrut Dağındaki KomEuphrates river lies along the east and southeast borders of Kâhta which is 35 km away from Adıyaman city. Kâhta central town is the largest and the most crowded town of Adıyaman. The surface area is 1490 km2 and altitude is 750 meter. The North and the South of Kâhta has an uneven field. The Nemrut mountain, which is in the southeast Toros, is 2150 meter, The Anka mountain, which is in the North of Narince town, is 2206 meter and this is one of the most important mountains in the borders of the town. Euphrates river is the most important river of the town. The historical Gendere Bridge (Roman Bridge) is over the Kâhta River. Most of the fields in the South of the town have been occupied by Atatürk Barajı now. Kâhta has many important historical places such as Kâhta Castle, Gendere Bridge, Commagene Kingdom statues on the Karakuş and Nemrut.

Euphrates river lies along the east and southeast borders of Kâhta which is 35 km away from Adıyaman city. Kâhta central town is the largest and the most crowded town of Adıyaman. The surface area is 1490 km2 and altitude is 750 meter. The North and the South of Kâhta has an uneven field. The Nemrut mountain, which is in the southeast Toros, is 2150 meter, The Anka mountain, which is in the North of Narince town, is 2206 meter and this is one of the most important mountains in the borders of the town. Euphrates river is the most important river of the town. The historical Gendere Bridge (Roman Bridge) is over the Kâhta River. Most of the fields in the South of the town have been occupied by Atatürk Barajı now. Kâhta has many important historical places such as Kâhta Castle, Gendere Bridge, Commagene Kingdom statues on the Karakuş and Nemrut.