The Malaysian Siamese (Malay: Orang Siam Malaysia) are an ethnicity or community who principally resides in Peninsular Malaysia which is a relatively homogeneous cultural region to southern Burma and southern Thailand but was separated by the Anglo-Siamese Treaty of 1909 between the United Kingdom and the Kingdom of Siam.

The treaty established the modern Malaysia-Thailand Border which starts from Golok River in Kelantan and ends at Padang Besar in Perlis.

[3] The Malaysian Siamese community share cultural similarities with the natives who inhabit the Malay Peninsula.

Community activities, ethnolinguistic identity and languages spoken by Malaysian Siamese are similar to their brethren in the fourteen provinces of Southern Thailand as well as the southernmost Burmese.

The Malaysian Siamese are well established in the northernmost states of Malaysia, namely Perlis, Kedah, Penang, Perak and Kelantan.