The following outline is provided as an overview and topical guide to Singapore: Singapore – a sovereign republic comprising the main island of Singapore and smaller outlying islands which are located at the southern tip of the Malay Peninsula in Southeast Asia. Singapore lies 137 kilometres (85 mi) north of the equator, south of the Malaysian state of Johor and north of Indonesia's Riau Islands and is in-between the Straits of Malacca and the South China Sea.