
The geography of Singapore is marked by a small, heavily urbanised, island city-state in Southeast Asia, located at the southern tip of the Malayan Peninsula between Malaysia and Indonesia. Singapore has a total land area of 699 km² and 193 km of coastline. It is separated from Indonesia by the Singapore Strait and from Malaysia by the Straits of Johor.
Singapore’s main territory is a diamond-shaped island, although her territory includes surrounding smaller islands. Singapore is slightly more than 3.5 times the size of Washington DC. Of Singapore’s dozens of smaller islands, Jurong Island, Pulau Tekong, Pulau Ubin and Sentosa are the larger ones. Most of Singapore is no more than 15 meters above sea level. The highest point of Singapore is Bukit Timah, with a height of 164 m (538 feet) and made up of igneous rock, granite. Hills and valleys of sedimentary rock dominate the northwest, while the eastern region consists of sandy and flatter land. Singapore has no natural lakes or rivers, but reservoirs and water catchment areas have been constructed to store fresh water for Singapore’s water supply.
Singapore has reclaimed land with earth obtained from its own hills, the seabed, and neighbouring countries. As a result, Singapore’s land area has grown from 581.5 km² in the 1960s to 699 km² today, and may grow by another 100 km² by 2030.