Kallang Gasworks (Chinese: 加冷煤气厂 Pinyin: Jiā lěng méi qì chǎng) was the first site dedicated to gas manufacturing from coal in Singapore. It operated from 1862 to 23 March 1998.

In 1862, it was constructed by the Singapore Gas Company and occupied an area of about 3.14ha. It was built to supply piped gas in Singapore, and was the first in the country. It had a daily production capacity of 1,000,000m³.

It was the largest gas works in Southeast Asia at the time. Today, the site is listed as a Historic Site by the National Heritage Board. The area is bounded by Kallang Road, Crawford Street, Kampong Bugis and the Rochor River.

At that time, gas was produced using coal and Kallang Gasworks was ideally located by the bank of the Rochor River. It made the delivery of coal supplies shipped from neighbouring countries convenient. The Kallang Basin site formed part of Singapore's southern coastline, before major land reclamation transformed the area into what it is today.

There were a total of four tanks used for operation at the plant.

Tanks 1 and 2 were constructed with the plant in 1862 and were used till 1957, when they were demolished.

Tank number 3 was added before 1900, and tank number 4 was the last addition. It was built between 1908 and 1909.

Gas production continued uninterruptedly for 137 years at the Kallang Gasworks, except for short breaks during the world wars.