Bangladeshis, the most widely used term to refer to the citizens of Bangladesh, comes from Bangladesh (meaning "Country of Bengal"), and can be traced to the early 20th century. Then, the term was used by Bengali patriotic songs like Namo Namo Namo Bangladesh Momo, by Kazi Nazrul Islam, and Aaji Bangladesher Hridoy, by Rabindranath Tagore.

British Bangladeshis (Bengali: বিলাতী বাংলাদেশী, romanized: Bilatī Bangladeshī) are people of Bangladeshi origin who have attained citizenship in the United Kingdom, through immigration and historical naturalisation.The term can also refer to their descendants. Bengali Muslims have prominently been migrating to the UK since the 1940s.