Tanglin is a planning area located within the Central Region of Singapore. Tanglin is located west of Newton, Orchard, River Valley and Singapore River, south of Novena, east of Bukit Timah, northeast of Queenstown and north of Bukit Merah.

The Central Region is one of the five regions in the city-state of Singapore and the main metropolitan region surrounding the Central Area. Comprising 13,150 hectares of land area, it includes 11 planning areas within the Central Area, as well as another 11 more outside it. The region is home to many of Singapore's national monuments as it was historically the site where the city was first founded and the country's only UNESCO World Heritage Site, the Singapore Botanic Gardens, a 165-year-old tropical garden is also located in the region.