Area: 55,598 sq mi (143,998 sq km) / World Rank: 93
Location: South Asia, between the Himalayan foothills and the Bay of Bengal, Northern and Eastern Hemispheres
Coordinates: 24° 00′N, 90° 00′E
Borders:  2,638  mi  (4,246  km)  total  border  length; India,  2,518 mi  (4,053  km); Myanmar,  120 mi  (193 km)
Coastline: 357 mi (574 km) long, on the Bay of Bengal of the Indian Ocean
Territorial Seas: 12 NM (22 km)
Highest Point: Keokradong, 4,034 ft (1,230 m)
Lowest Point: Sea level
Longest Distances:  477 mi  (767  km)  SSE-NNW/  267 mi (429 km) ENE-WSW
Longest River:   Brahmaputra River,  total  length 1,700 mi (2,900 km)
Largest Lake: Karnaphuli Reservoir, 253 sq mi (655 sq km)
Natural Hazards:  Severe  seasonal  flooding,  cyclonic storms,  tidal bores,  tornadoes, ground water  arsenic contamination, hailstorms, moderate earthquake risk
Population: 131,269,860 (2001 est.) / World Rank: 8
Capital City: Dhaka, located in the center of Bangladesh.
Largest City:  Dhaka  (2002  population  estimated  at over 10 million)

Bangladesh  is dominated by a vast multi-river basin and  delta.  The  huge  Brahamputra  (or  Jamuna)  and Ganges (or Padma) Rivers meet in the center of the country and countless connecting streams and rivers, some of them very large, run between the two rivers or flow south into the Indian Ocean. A small coastal region (Chit- tagong) in the southeast is the only part of the country outside this network of rivers. Small hill regions in the northeast and southeast are the only topological variation of the land’s flat alluvial plains. This geography is both a gift, creating bountiful rice-growing land by the seasonal flux of great river systems, and a curse, making the population vulnerable to flooding. With some 90 percent of Bangladesh’s land within 33 ft (10 m) of sea level, the country is extraordinarily vulnerable to flooding due to its many great rivers and heavy rainfall. Bangladesh also has one of the world’s highest populations and is believed to be the most densely populated country on Earth.

Bangladesh’s one major lake is largely an artificial one: Karnaphuli Reservoir  (also known as Kaptai Lake), in the Chittagong Hill Tracts. It was for the most part formed  by  damming  the  Karnaphuli  River  in  1963  for hydroelectric power. Much smaller lakes called “mils” or “haors” are formed within the network of rivers winding across  Bangladesh’s  plains.  The  region  around  Sylhet  is known  as  the  Sylhet  Plain,  or  the  Surma  River  Plain. There and  throughout  the upper Meghna-Surma drainage area, the most distinguishing feature is the profusion of large and small lakes. This whole lake-dotted northeast quadrant of the Bangladesh Plain is even more vulnerable to flooding than the other parts of the country.
Bangladesh is formed by the great rivers that move the snow-melt of the Himalayas through India to their outlets  in Bangladesh’s delta  region. Rich  soil  is brought along by the rivers as old soil is carried away, and the rivers  provide  fish  and  transportation  for  the  people  of Bangladesh.  The  rivers  also  cause  hardship  due  to  seasonal flooding and shrinking land for settlement. The balance of water input and output is intrinsic to Bangladesh’s  survival,  and  environmental  policies  in  India, upstream, can have huge effects on Bangladesh. The river network of Bangladesh’s plain moves generally from north to south but includes untold numbers of feeder and effluent streams, like capillaries, flowing east, west, southeast, and southwest. Within Bangladesh’s riverine  labyrinth,  change  is  constant  as  rivers modify  or shift their channels. The Ganges River of India, flowing southeastward, comes to the boundary of Bangladesh in the northwest of the country. For about 90 mi (145 km) the Ganges is the boundary between India and Bangladesh; it then continues to the southeast across the alluvial plain. In Bangladesh the Ganges is commonly called the Padma. The area south of the Padma is of very low elevation, and the hundreds of rivers and streams in this true delta segment of the plain are virtually all distributary from the Padma. Principal among them are the Madhumati River and the Arial Khan (also known as the Bhubanswar). Most flow south,  and many  of  them  reach  the  Indian Ocean. The result is a network of channels entering the Bay of Bengal through a crumbled seacoast that stretches for hundreds of miles, including part of India. It is often referred to as “the many mouths of the Ganges".

Oceans and Seas
Bangladesh sits at the apex of the Bay of Bengal, a part  of  the  Indian Ocean. Despite  this, Bangladesh  is  a river nation rather than an ocean-oriented nation. Its ports,  including  the  largest,  Chittagong,  are  all  river ports. The ocean often threatens catastrophe for Bangladesh, in the form of cyclonic storms and tidal bores.
The tidal waves called bores recur from time to time in Bangladesh’s estuary areas and its stem rivers. Tidal bores tend  to  form  high  waves  with  abrupt  fronts  when  the incoming surge of water at flood tide encounters a resistance, such as a sandbar. The funnel shape of the Padma- Meghna River estuary and the many channels between the islands are highly favorable to bore formation. A typical tidal bore rushes in with thunderous noise and a wall of water. Velocity and height are magnified if the tidal bore is backed by strong winds from the south, as occurs during cyclonic storms.

Bangladesh experiences three seasons. The winter, from October to early March, has temperatures from 41°F to 72°F (5°C to 22°C). Then the hot season arrives in March with temperatures averaging 90°F (32°C). During the monsoon  season,  from May  to September,  tempera- tures average 88°F (31°C) with 90 to 95 percent humidity.

Bangladesh’s  economic  resources  are  primarily  agricultural. Bangladesh is a major rice producer, ranked 5th in  the world  in 1999-2000. The rice crop  is  largely used for domestic consumption. Jute (a fiber crop) and fishing are other significant economic resources. Important reserves of natural gas and some oil exist in northeast Bangladesh and offshore in the Bay of Bengal. Coal is found in western Bangladesh.