St Thomas Walk is a residential road in the River Valley area of Singapore. The road is in Postal District 09. It comprises two parts that join together to form a stylized "N". The longer portion connects to River Valley Road while the shorter one to Killiney Road.
Singapore Street Names could not provide an explanation to the etymology of this name. It speculated that the road was possibly named after Dr Thomas Oxley's patron saint, as Oxley owned property there.