Burma  is an ethnically diverse nation with 135 distinct ethnic group

Ethnic group

An ethnic group is a group of people whose members identify with each other, through a common heritage, often consisting of a common language, a common culture and/or an ideology that stresses common ancestry or endogamy...

s officially recognized by the Burmese government

State Peace and Development Council

The State Peace and Development Council was the official name of the military regime of Burma , which seized power in 1988. On 30 March 2011, Senior General Than Shwe signed a decree to officially dissolve the Council....

. These are grouped into eight "major national ethnic races":

1. Kachin
2. Kayah
3. Kayin
   Karen people
   The Karen or Kayin people , are a Sino-Tibetan language speaking ethnic group which resides primarily in southern and southeastern Burma . The Karen make up approximately 7 percent of the total Burmese population of approximately 50 million people...
   
   
4. Chin
   Chin people
   The Chin , known as the Kuki in Assam, are one of the ethnic groups in Burma. The Chins are found mainly in western part of Burma and numbered circa 1.5 million. They also live in nearby Indian states of Nagaland, Mizoram and Manipur and Assam. Owing to Mizo influence and Baptist missionaries'...
   
   
5. Mon
   Mon people
   The Mon are an ethnic group from Burma , living mostly in Mon State, Bago Division, the Irrawaddy Delta, and along the southern Thai–Burmese border. One of the earliest peoples to reside in Southeast Asia, the Mon were responsible for the spread of Theravada Buddhism in Burma and Thailand...
   
   
6. Bamar
   Bamar
   The Bamar are the dominant ethnic group of Burma , constituting approximately two-thirds of the population. The Bamar live primarily in the Irrawaddy basin, and speak the Burmese language, which is also the official language of Burma. Bamar customs and identity are closely intertwined with general...
   
   
7. Rakhine
   Rakhine people
   The Rakhine , is a nationality in Myanmar forming the majority along the coastal region of present day Rakhine State or Arakan State. They possibly constitute 5.53% or more of Myanmar's total population but no accurate census figures exist. Rakhine people also live in the southeastern parts of...
   
   
8. Shan

The "major national ethnic races" are grouped primarily according to region rather than linguistic or ethnic affiliation, as for example the Shan Major National Ethnic Race includes 33 ethnic groups speaking languages in at least four widely differing language families.http://myanmartravelinformation.com/mti-myanmar-people/index.htm

Many unrecognised ethnic groups exist, the largest being the Burmese Chinese

Burmese Chinese

The Burmese Chinese or Chinese Burmese are a group of overseas Chinese born or raised in Burma . Although the Chinese officially make up three percent of the population, the actual figure is believed to be much higher...

 and Panthay

Panthay

Panthays form a group of Chinese Muslims in Burma. Some people refer to Panthays as the oldest group of Chinese Muslims in Burma. However, because of intermixing and cultural diffusion the Panthays are not as distinct a group as they once were.-Etymology:...

 (who together form 3% of the population), Burmese Indians

Burmese Indians

Burmese Indians are a group of people of Indian subcontinental ethnicity who live in Myanmar . While Indians have lived in Burma for many centuries, most of the ancestors of the current Burmese Indian community emigrated to Burma from the start of British rule in the mid 19th century to the...

 (who form 2% of the population), Anglo-Burmese and Gurkha

Burmese Gurkha

Gurkha People are a group of people of Gurkha ethnic origin living in the Southeast Asian nation of Myanmar...

.