Moklen is an Austronesian language spoken on the western coast of southern Thailand. It is related to but distinct from the Moken language of Myanmar and southern Thailand. Unlike Moken, it is not spoken in Myanmar.

Larish (2005) lists three main Moklen areas in Thailand. Moklen is spoken mostly, but not exclusively, in Phang Nga Province. It is also spoken in Ranong Province and Phuket Island.

• Northern Moklen area (eight villages): located about 40 km (25 mi) from the main concentration of Jadiak Moken speakers in Ranong Province, Thailand, ranging from the villages of Ko Phra Thɔɔng (เกาะพระทอง; in Khura Buri District) in the north to Baang Sak in the south. There is a high degree of interaction with Moken in the Ko Phra Thɔɔng area.
• Central Moklen area (nine villages): from Paak Wiip (in Takua Pa District) to Hin Laat. The Baan Dɔɔn Can dialect is the variety mainly studied by Larish (1999, 2005).
• Southern Moklen area (three villages): northern tip of Phuket Island.

Swastham (1982) describes the Moklen dialect of Lam Phi (ลำภี), Thai Mueang District, Phang Nga Province in southern Thailand. Other Moklen villages near Lam Phi listed by Swastham (1982) are, listed from north to south, Bang Sak, Khuk Khak, Bang Niang, Thung Maphraw, and Tha Chat Chai.

Bishop & Peterson (1987) survey various Moklen dialects.

v t e Languages of Thailand
Official language	Thai
Other Thais	Lao–Phutai Isan Phu Thai Chiang Saen Northern Thai Tai Lü Phuan Thai Song Sukhothai Southern Thai Northwestern Khün Shan Tai Nüa
Minority by languages groups	Austroasiatic Bru Chong Chung Jahai Kensiu Khmer Northern Western Kintaq Kuy Mlabri Mon Nyah Kur Palaung Ten'edn Thavung Vietnamese Austronesian Cham Malay Bangkok Malay Pattani Malay Satun Malay Moken Moklen Urak Lawoi’ Hmong-Mien Hmong Iu Mien Sino-Tibetan Akha Eastern Pwo Lisu Sinitic Cantonese Teochew Hakka Hokkien Hainanese Hokchew Nuosu Mpi Northern Pwo Phrae Pwo Red Karen (Eastern Kayah) S'gaw Karen Ugong
Non-Indigenous	Immigrant language Burmese Hindi Punjabi Russian Southwestern Mandarin Working language English Japanese Korean
Sign languages	Thai Sign Language Ban Khor Sign