Bukit Batok (IPA: /ˈbʊkɪt ˌbɑːtoʊk/ BUUK-it BAH-tohk), often abbreviated as Bt Batok, is a planning area and matured residential town located along the eastern boundary of the West Region of Singapore. Bukit Batok statistically ranks in as the 25th largest, the 10th most populous and the 9th most densely populated planning area in Singapore. It is bordered by six other planning areas - Choa Chu Kang to the north, northeast and northwest, Bukit Panjang to the northeast and east, Clementi to the south, Bukit Timah to the southeast, Jurong East to the southwest and Tengah to the west.

Bukit Batok largely sits on Gombak norite, a geological formation that is found in high concentrations within the planning area itself, as well as in the western parts of neighbouring Cashew. It was this presence of the igneous rock that made Bukit Batok a pivotal location for the quarrying industry in Singapore around the turn of the mid-20th century.

Many differing accounts describe the origin of the name Bukit Batok. Bukit means "hill" in Malay, thus the name of the town gives the impression of it being hilly. Batok, however, has several interpretations.

One version, according to a Javanese village chief of the village Gassing, that coconut trees grew in the hilly area and hence the area was named batok, the Javanese term for coconuts.

The Chinese version is that the hills of solid granite, which is called batu in Malay, and then subsequently misnamed as bato and then finally batok. Another version was that hill looks like a human skull top and the words skull top was pronounced as batok.

Others believe that batok, the Malay word for cough, is linked to the place either because of its cool air (causing coughs and colds), or due to the sound of explosives historically used at its granite quarry, Little Guilin.

Before the 1940s, Bukit Batok was heavily dominated by rubber and pineapple plantations. At the start of the 1940s, industrialization began to gradually occur in Bukit Timah. Ford factory was one of the first factories to be built along Bukit Timah road near the current day's site.

During the battle of Singapore in the World War II, Bukit Batok became a significant ground for both the Allied and Axis powers. The failed attempt by the British to defend the vicinity during the Battle of Bukit Timah and their subsequent surrender on 15 February 1942 to the Japanese at the Ford Motor Factory was described by Winston Churchill as the "largest capitulation" in British military history.