|• Mayor||Murat Kaya (AKP)|
|• Kaymakam||Idris Akbiyik|
|• District||727.47 km2 (280.88 sq mi)|
|• District density||66/km2 (170/sq mi)|
Geyve is a town in Sakarya Province in the Marmara region of Turkey. The closest international airport is Istanbul Sabiha Gökçen International Airport, 139 km (86 mi) from Geyve. It is the third largest town of Sakarya Province in terms of area. Geyve is located at the foot of Geyve Gorge, which is set between two mountain ranges and lies along the Sakarya River. Geyve region has an impressive green landscape and productive nature. Geyve is relatively close to many important cities in Turkey; 179 km (111 mi) to Istanbul, 30 km to Adapazarı, 75 km (47 mi) to Izmit, 139 km to Bursa, 156 km (97 mi) to Eskişehir, 167 km (104 mi) to Bolu according to Google Maps.
Geyve is located at the coordinates 40° 30′ 0″ N, 30° 18′ 0″ E. The highest point of Geyve is Cine Tasi Hill at 1,040 m (3,410 ft) and the town center elevation is 124 m (407 ft). The third longest river in Turkey, Sakarya River runs through Geyve and it is perceived as an important inspiration of the town.
Geyve is lying down on the North Anatolian Fault System. According to historical records, many devastating earthquakes have occurred in the last two millennia along the surrounding area. A detailed study is provided at Segment Structure of the Southern Strand of the North Anatolian Fault System and Paleoseismic Behaviour of the Gemlik Fault, NW Anatolia
In recent history, on 22 July 1967, a strong, 7.2 Richter magnitude scale earthquake hit Geyve and had given considerable damage to the town. On 17 August 1999, Geyve, despite the proximity to epicenter of earthquake, was not destroyed as the neighboring Adapazarı and Gölcük. Unfortunately, Turkish earthquake scientists had made several worrying reports that the next expected Marmara earthquake could impact Geyve and Akyazı region as there had been an additional fault under Geyve, which had not broken in the last 300 years. Some of the Turkish media reports regarding the statements can be found at the following links; , 
Sakarya River is passing through Geyve, and is one of the important water sources for the land/agriculture. Geyve Karaçay Creek is also passing through the town center. On June 6, 2014, Geyve has experienced a significant flooding caused by Karaçay Creek after heavy rain, resulting in tremendous destruction and one fatality.
Geyve's economy is centered in agriculture as it has a productive agricultural land. It has a mild transitional climate, carrying mixed characteristics of Mediterranean, Black Sea and Inland Anatolian climates. Geyve's climate, the Sakarya River, and its productive land allow the varieties of fruits, vegetables and grains to be produced in Geyve. Sakarya River is the main vessel of town's agriculture. Especially, the quince, cherry, apple, peach and grape of Geyve are quite well known in local and Istanbul markets.
Since the end of the 1990s, Geyve has been a popular trekking destination, presenting different routes especially with its proximity to Istanbul.
Alifuatpasa Train Station was serving Geyve for over 100 years until February 2012 when Ankara-Istanbul railway was closed for Ankara-Istanbul high-speed railway construction. Ankara-Istanbul high-speed railway, which is expected to be finished by 2014, will run through Geyve. Even though it is not certain, the high-speed train is expected to stop at the neighboring towns, Pamukova and Arifiye.
There is not enough scientific evidence available regarding the first settlers of Geyve. The ruins around the region do not survive, but it is almost certain that Geyve is an historical settlement dating back thousands of years. There are different claims that its origin goes to 4000 BC, and even some sources to 10000 BC. Geyve region has been inhabited by Phrygians, Hitites, Lydians, Romans, Armenians, Byzantines, Turks and many other civilizations since prehistoric times. Many historical evidence from Byzantine and Roman Empire era have been discovered in Geyve. Geyve was known to be one of the early Ottoman conquests. It was conquered by Osman Gazi (reigned c. 1299–1323/4), first Ottoman Sultan, in the 14th century from Byzantine Empire.
The demography of the town has been significantly impacted by the population exchange between Greece and Turkey in 1923. Before 1923, the town had considerable Rum (Eastern Roman, Greek) and Armenian populations along with Turks. Several old photographs and evidence have been collected by a local researcher-collector in the following link.
The origin of Geyve's name is controversial. Evliya Celebi, famous Turkish-Ottoman traveller, in his Seyahatname states that Geyve's name comes from the Byzantine princess named Gekve.
Geyve was one of the symbolic towns in the Turkish War of Independence (1919–1922). Geyve Gorge had a strategic importance during the War of Independence. Alifuatpaşa, Geyve is one of the first resistance fronts of the war, commanded and led by Ali Fuat Cebesoy against British Army heading to Anatolia. The founder of the Turkish Republic, Mustafa Kemal Ataturk, visited Geyve two times in 1920 and 1922 during the War of Independence.
The most significant landmark of the town,the old bridge over Sakarya River in Alifuatpasa, was constructed in the era of Sultan Bayezid II of Ottoman Empire (reigned 1481–1512). The bridge was kept well by Ottoman Sultans as the bridge is strategically located on the Silk Road.One of the oldest photographs of the bridge (from around 1888) by a Swedish photographer, Guillaume Berggren, is depicted in the National Gallery of Canada.
Another significant landmark is Elvanbey Imarethanesi,(Public Kitchen), which was constructed in 1451 by Elvanbey. It was told to be serving to the traveling dervishes of Anatolia. The building was used as Geyve Public Library between 1969 and 2013. In 2013, the building was converted to a museum.
One of the most prominent generals of Turkish War of Independence, Ali Fuat Cebesoy was buried in Alifuatpasa, Geyve, when he died at the age of 86 in 1968. In accordance with his will, he was buried to the backyard of a mosque near Geyve train station, where the first shots of the Turkish War of Independence were fired.
Roses of Geyve (Geyve'nin Gülleri) was cited in the famous poem of Sezai Karakoç's Mona Roza.
- "Area of regions (including lakes), km²". Regional Statistics Database. Turkish Statistical Institute. 2002. Retrieved 2013-03-05.
- "Population of province/district centers and towns/villages by districts - 2012". Address Based Population Registration System (ABPRS) Database. Turkish Statistical Institute. Retrieved 2013-02-27.
- "Doğançay Şelalesi Tabiat Anıtı" (in Turkish). Sakarya Orman ve Su İşleri Müdürlüğü. Retrieved 2016-10-29.