東印度公司（英文The East India Company），又名英國東印度公司（English East India Company），聯合條約（Treaty of Union）後，又叫（the British East India Company）係英國公司，係該國早年聯合股份公司（Joint-stock company） 。公司開來同東印度羣島做生意，搞搞下變咗主要同印度次大陸同中國做生意，係歐洲各國之中，最早一間東印度公司。公司曾經合拼，大概可分爲兩個時期。早期爲專司東印度羣島生意嘅倫敦商人之總督及公司（Governor and Company of Merchants of London Trading into the East Indies），有英國皇家特許狀（Royal Charter），該狀有名，由女王伊利莎伯，喺一六〇〇年十二月卅一號發。 
十七世紀後期，亦有其他英國公司，如英國東印度貿易公司（East India Trading Company），想挑戰佢壟斷地位。最後公司同其他公司合併，一七〇八年成爲專司東印度羣島生意嘅商人聯合公司（United Company of Merchants of England Trading to the East Indies），自此亦別號尊貴東印度公司（Honourable East India Company，減筆 HEIC）。因爲係聯合公司，亦叫聯合東印度公司（United East Indian Company，因拉丁文U/V可混用，又寫Vnited East Indian Company，減筆VEIC）。公司有花名叫莊公司（John Company）。喺印度又叫Company Bahadur（Hindustani bahādur, "brave"/"authority"）。
東印度公司做生意，以棉花、絲、硝石、茶同鴉片爲主。公司唔單止做生意，憑軍力同行政手段，佢兼管印度大片地。公司治印度，始自一七五七年，巴叻士之戰（Battle of Plassey）後。到一八五八年，喺一八五七年印度之亂（Indian Rebellion of 1857）而終。一八五八年，英國政府立法，名一八五八年印度政府法案（Government of India Act 1858），英國皇家直管印度，成爲印度之王。公司最後喺一八七四年一月一號，因東印度公司股息贖回法案（East India Stock Dividend Redemption Act）解散，股東得印度政府債券做補償，而女王域多利，就成爲首任印度皇帝（Empress of India）。
- Encyclopaedia Britannica 2008, "East India Company"
- 1. Columbia Encyclopedia 2007, "East India Company, British". 2. Marx, Karl (25 June 1853), "The British rule in India", New York Daily Tribune republished in Carter, Mia; Harlow (editors), Barbara (2003), Archives of Empire, Raleigh: Duke University Press. Pp. 802, ISBN 0822331640. Quote (p. 118): "I do not allude to European despotism, planted upon Asiatic despotism, by the British East India Company, forming a more monstrous combination than any of the divine monsters startling us in the temple of Salsette."
- The Dutch East India Company was the first to issue public stock.
- The Register of Letters &c. of the Governor and Company of Merchants of London trading into the East Indies, 1600–1619. On page 3, a letter written by Elizabeth I on 23 January 1601 ("Witnes or selfe at Westminster the xxiiijth of Ianuarie in the xliijth yeare of or Reigne.") states, "Haue been pleased to giue lysence vnto or said Subjects to proceed in the said voiadgs, & for the better inabling them to establish a trade into & from the said East Indies Haue by or tres Pattents vnder or great seale of England beareing date at Westminster the last daie of december last past incorporated or said Subjecte by the name of the Gournor & Companie of the merchaunts of London trading into the East Indies, & in the same tres Pattents haue geven them the sole trade of theast Indies for the terme of XVteen yeares ..."
- A. Oxford English Dictionary (Draft Edition, September 2008, requires subscription) entry for "honourable": "2b. Applied as an official or courtesy title of honour or distinction." Usage: ... the prefix ‘Honourable’ ... is also applied to the House of Commons collectively; ... also formerly to the East India Company, etc. Examples: 1698 FRYER Acc. E. India & P. 38 "In pay for the Honourable East India Company." B. Encyclopaedia Britannica 1911, "HONOURABLE (Fr. honorable, from Lat. honorabilis, worthy of honour), a style or title of honour common to the United Kingdom, the British colonies and the United States of America.... The epithet is also applied to the House of Commons as a body and to individual members during debate ('the honourable member for X.'). Certain other corporate bodies have, by tradition or grant, the right to bear the style; e.g. the Honourable Irish Society, the Inns of Court (Honourable Society of the Inner Temple, &c.) and the Honourable Artillery Company; the East India Company also had the prefix 'honourable' . The style may not be assumed by corporate bodies at will, as was proved in the case of the Society of Baronets, whose original style of 'Honourable' Society was dropped by command." C. Birdwood, George (1891), Report on The Old Record of the India Office, London: W. H. Allen & Co., Limited, and at Calcutta Quote (p. 14): "The English Company [Including The General Society chartered by William III, 3 September 1698] trading with the East , commonly called "the New Company," was incorporated by William III, 5 September 1698; its charter running to 1714. The above Company of Merchants of London and the English Company, were finally incorporated under the name of "The United Company of Merchants of England trading to the East [commonly styled, "the Honourable East India Company"] in 1708-9."
- Hawes, Christopher J. (1996), Poor Relations: The Making of a Eurasian Community in British India, 1773-1833, London: Routledge. Pp. 217., ISBN 0700704256 Quote (p. xiii): "Abbreviations: Honourable East India Company (HEIC)."
- Ride, Lindsay; Ride, May; Mellor, Bernard (1995), An East India Company Cemetery: Protestant Burials in Macao, Hong Kong: Hong Kong University Press. Pp. 304, ISBN 9622093841 Quote (p. 7): "In 1709, the Company amalgamated with a rival group, which had been chartered in 1698 by William III. This union took the title 'The Honourable East India Company,' which was shortened for general use to 'the Honourable Company' and more often still to John Company, until it ceased operations in 1834, after its monopoly of British trade with China was discontinued."
- Gandhi, M. K. (1997), Hind Swaraj and other writings, (Edited by Anthony J. Parel) Cambridge and London: Cambridge University Press. Pp. 208., ISBN 0521574315. Quote (p.39): "... They came to our country originally for the purpose of trade. Recall the Company Bahadur.† Who made it Bahadur? They had not the slightest intention at the time of establishing a kingdom. Who assisted the Company's officers? Who was tempted by their silver? Who bought their goods? History testifies that we did all this. ... †: 'the Company Bahadur': an honorific title by which the East India Company was known among Indians. 'Bahadur' means brave, powerful, sovereign."