Kubur Kassim (Arabic: قبر قاسم) is a Muslim cemetery located in the Siglap neighbourhood in the East Region, Singapore.

It houses burials of prominent Malay Muslim figures, including Hafeezudin Sirajuddin Moonshi, a doctor who opened the first Muslim-owned clinic in Singapore.

It has also received some publicity in the form of superstitions, mainly through stories and legends attributing the cemetery to have been frequented by the mythological Orang Bunian.

[1][2] Another mausoleum in the cemetery is the Keramat Sheikh Ali, a burial place of another Sufi mystic.

[2][8] Local legends claim that the cemetery is frequented by the Orang Bunian, a mythological cryptid people that come from a different dimension.