The geographically small island nation of Singapore has few rivers of significant length or width, the longest of which, the Kallang River

Kallang River

The Kallang River flows for 10 kilometres from the Lower Peirce Reservoir to the coast at Nicoll Highway, making it the longest river in Singapore...

 is only 10 km in length. The Singapore River

Singapore River

The Singapore River is a river in Singapore with great historical importance. The Singapore River flows from the Central Area, which lies in the Central Region in the southern part of Singapore before emptying into the ocean...

, arguably the most famous in the country, is of insignificant length as well. However, the country's tropical climate and heavy rainfall require a very comprehensive network of natural draining systems, much of which has become concrete system as urbanisation spread across the island.

Canalised

• Alexandra Canal, Singapore
• Geylang River
  Geylang River
  Geylang River is a canalised river in Geylang of the Eastern Region in Singapore. With the formation of the Marina Reservoir after the completion of the Marina Barrage in 2008, the river now forms part of the reservoir....
  
  
• Kallang River
  Kallang River
  The Kallang River flows for 10 kilometres from the Lower Peirce Reservoir to the coast at Nicoll Highway, making it the longest river in Singapore...
  
  
• Pelton Canal
• Rochor Canal
  Rochor Canal
  Rochor Canal is a canal in the Central Region of Singapore. The canal is about 1.4 km in length.Rochor Canal is a continuation of an unnamed canal that passes through the Bukit Timah area, which starts beneath the junction of Jalan Jurong Kechil and Upper Bukit Timah Road...
  
  
• Rochor River
  Rochor River
  Rochor River is a canalised river in Kallang of the Central Region in Singapore. The river is about 0.8 km in length....
  
  
• Siglap Canal
• Singapore River
  Singapore River
  The Singapore River is a river in Singapore with great historical importance. The Singapore River flows from the Central Area, which lies in the Central Region in the southern part of Singapore before emptying into the ocean...
  
  
• Stamford Canal, Singapore
• Sungei Bedok
• Sungei China
• Sungei Ketapang
• Sungei Lanchar
• Sungei Pandan (lower reaches dammed as Pandan Reservoir
  Pandan Reservoir
  Pandan Reservoir is a reservoir located in the West Region of Singapore. Formed by damming the mouth of Sungei Pandan, it is the largest service reservoir in Singapore providing non-potable water to the surrounding industrial areas and in particular, the Jurong Industrial Estate...
  
  )
• Sungei Pinang (Hougang
  Hougang
  Hougang is an urban planning area and a suburb in the north-eastern area of the city-state of Singapore. Under classification by the Urban Redevelopment Authority, the area is part of the North-East Region, an urban planning division. Hougang borders Sengkang in the north and Serangoon to its...
  
  )
• Sungei Punggol
  Sungei Punggol
  Sungei Punggol is a river located within the North-East Region in Singapore.-Geography:...
  
  
• Sungei Seletar Simpang Kiri
• Sungei Sembawang
• Sungei Serangoon
  Sungei Serangoon
  Sungei Serangoon is a river in the north-eastern part of Singapore. The 8-kilometre river starts as a canal near Tampines Road, and flows through Hougang, where it is joined by tributary Sungei Pinang just before Sengkang, before flowing towards Lorong Halus, where it is joined by another...
  
  
• Sungei Simpang Kanan
• Sungei Tampines
• Sungei Ulu Pandan
• Sungei Whompoe

Pulau Tekong

Pulau Tekong

Pulau Tekong is the second largest of Singapore's outlying islands with an area of 24.43 km², and the island is still expanding due to land reclamation works on its southern and northwestern coasts which will eventually subsume many of its surrounding small islets, including Pulau Tekong...

• Sungei Belang
• Sungei Chek Mat Nah
• Sungei Pasir
• Sungei Permatang
• Sungei Sanyongkong
• Sungei Seminei
• Sungei Unum

Pulau Ubin

Pulau Ubin

Pulau Ubin is a small island situated in the north east of Singapore, to the west of Pulau Tekong. Granite quarrying supported a few thousand settlers on Pulau Ubin in the 1960s, but only about a hundred villagers live there today...

• Sungei Asam
• Sungei Batu Kekek
• Sungei Besar
• Sungei Jelutong
• Sungei Mamam
• Sungei Puaka
• Sungei Pulau Ubin
• Sungei Teris
• Sungei Tiga
• Sungei Wat Siam

Dammed and flooded

• Sungei Chik Abu - flooded and part of Lower Seletar Reservoir
  Lower Seletar Reservoir
  Lower Seletar Reservoir is a reservoir located in the northeastern part of Singapore, to the east of Yishun New Town. The reservoir has a surface area of 3.6 km², and a capacity of 9.5 million m³. The mean depth of the reservoir is 2 m, with a maximum depth of 5.5 m...
  
  
• Sungei Puaka - flooded and part of Lower Seletar Reservoir
  Lower Seletar Reservoir
  Lower Seletar Reservoir is a reservoir located in the northeastern part of Singapore, to the east of Yishun New Town. The reservoir has a surface area of 3.6 km², and a capacity of 9.5 million m³. The mean depth of the reservoir is 2 m, with a maximum depth of 5.5 m...
  
  
• Sungei Kranji - now the Kranji Reservoir
  Kranji Reservoir
  Kranji Reservoir is a reservoir in the northern part of Singapore, near the Straits of Johor was a former freshwater river that flowed out into the sea that dammed at its mouth to form a freshwater reservoir. It can also be classified as an estuary...
  
  
• Sungei Sopok - flooded and part of Lower Seletar Reservoir
  Lower Seletar Reservoir
  Lower Seletar Reservoir is a reservoir located in the northeastern part of Singapore, to the east of Yishun New Town. The reservoir has a surface area of 3.6 km², and a capacity of 9.5 million m³. The mean depth of the reservoir is 2 m, with a maximum depth of 5.5 m...
  
  
• Sungei Tengeh - now the Tengeh Reservoir
  Tengeh Reservoir
  Tengeh Reservoir is one of the four reservoirs in the Western Water Catchment of Singapore.This reservoir was formerly a river, Sungei Tengeh, which emptied into the Straits of Johor and was dammed to become a reservoir....