Geylang Bahru is a subzone within the planning area of Kallang, Singapore, as defined by the Urban Redevelopment Authority (URA).

It is bounded by the Pan Island Expressway (PIE) in the east; the Pelton Canal in the south; the Kallang River in the west; and Serangoon Road in the north.

Made up of both residential and industrial developments, other notable places in Geylang Bahru include the Kallang Basin Swimming Complex, Kallang Distripark, the main office of Jalan Besar Town Council, the office of the Singapore Examinations and Assessment Board (SEAB) and Ministry of Manpower (MOM) Services Centre.

This road was eventually merged to form part of the present-day Pan Island Expressway (PIE).

During the dredging of the Kallang River in the late 1960s and early 1970s,[4] the Singapore government filled and leveled up the surrounding riverside with red mud that was carried by trucks from a nearby hill called Ang Chiang San (modern-day Toa Payoh).