Ganges is in india , length is 1560mi, and source is Himalayas
The Ganges River, also called Ganga, is a river located in northern India that flows toward the border with Bangladesh (map). It is the longest river in India and flows for around 1,569 miles (2,525 km) from the Himalayan Mountains to the Bay of Bengal. In modern times the Ganges River has become a source of life for the nearly 400 million people living in its basin. They rely on the river for their daily needs such as drinking water supplies and food and for irrigation and manufacturing. Today the Ganges River basin is the most populated river basin in the world. Ganges River. The Ganges River (Ganga River) is 1,560 mi (2,510 km) in length, with its source high in the Himalayas. The river carries a very high sediment load and has unstable banks that frequently migrate. The Ganges Basin, which includes parts of India, Nepal, China, and Bangladesh, has one of the highest human population densities in the world. The river generally flows eastward and in Bangladesh empties into the Bay of Bengal. The Ganges river has its source in the Himalayas, at Gaumakh in the southern Himalayas. The Ganga river has been declared as India's National River. A species of dolphins found in the Ganges river know as the Ganges Dolphin was recently declared as the National Aquatic Animal of India.  The discharge of the Ganges also differs by source. Frequently, discharge is described for the mouth of the Meghna River, thus combining the Ganges with the Brahmaputra and Meghna. This results in a total average annual discharge of about 38,000 m 3 /s (1,300,000 cu ft/s), or 42,470 m 3 /s (1,500,000 cu ft/s). The Ganges was ranked as the fifth most polluted river of the world in 2007. Pollution threatens not only humans, but also more than 140 fish species, 90 amphibian species and the endangered Ganges river dolphin. In some cases, the length of the Ganges is given for its Hooghly River distributary, which is longer than its main outlet via the Meghna River, resulting in a total length of about 2,620 km (1,630 mi), from the source of the Bhagirathi, or 2,135 km (1,327 mi), from Haridwar to the Hooghly's mouth. The discharge of the Ganges also differs by source. Frequently, discharge is described for the mouth of the Meghna River, thus combining the Ganges with the Brahmaputra and Meghna. This results in a total average annual discharge of about 38,000 m 3 /s (1,300,000 cu ft/s), or 42,470 m 3 /s (1,500,000 cu ft/s). Ganga is the longest river of India. The total length of the Ganga river from its source to its mouth (measured along the Hughli) is 2525 km of which 1450 km is in the Uttar Pradesh, 445 km in Bihar and 520 km in West Bengal. The remaining 110 km stretch of the Ganga forms the boundary between Uttar Pradesh and Bihar. At Allahabad, about 770 km south-east of Haridwar, Ganga is joined by Yamuna, which is its most important tributary. After Farraka in West Bengal, the river ceases to be known as the Ganga. It bifurcates itself into Bhagirathi-Hughli in West Bengal and Padma-Meghna in Bangladesh. These rivers are famous all over India for different reasons. The Ganges (also known as Ganga or Gonga), is the biggest river in the Indian subcontinent in terms of water flow. The length of the Ganga is 2,510 km or 1,560 miles. The river has its origin in the Western Himalayan Ranges in the state of Uttarakhand. The followers of Hindu religion regard the Ganges to be the most sacred of all the rivers in India.  The Hooghly River is formed by the confluence of the Bhagirathi River and Jalangi River at Nabadwip, and Hooghly has a number of tributaries of its own. The largest is the Damodar River, which is 541 km (336 mi) long, with a drainage basin of 25,820 km 2 (9,970 sq mi). The Ganges was ranked as the fifth most polluted river of the world in 2007. Pollution threatens not only humans, but also more than 140 fish species, 90 amphibian species and the endangered Ganges river dolphin. In some cases, the length of the Ganges is given for its Hooghly River distributary, which is longer than its main outlet via the Meghna River, resulting in a total length of about 2,620 km (1,630 mi), from the source of the Bhagirathi, or 2,135 km (1,327 mi), from Haridwar to the Hooghly's mouth. The Ganges was ranked as the fifth most polluted river of the world in 2007. Pollution threatens not only humans, but also more than 140 fish species, 90 amphibian species and the endangered Ganges river dolphin.
http://geography.about.com/od/culturalgeography/a/Ganges-River.htm http://deltas.usgs.gov/rivers.aspx?river=ganges http://www.prokerala.com/maps/india/ganges-river-map.html https://en.wikipedia.org/wiki/Ganges http://schools-wikipedia.org/wp/g/Ganges.htm http://www.thecolorsofindia.com/interesting-facts/geography/longest-river-of-india.html http://www.mapsofindia.com/maps/rivers/ganges.html https://en.wikipedia.org/wiki/Ganges https://en.wikipedia.org/wiki/Ganges
Where is the river Ganges and where is its source and length