The Rio de Janeiro bus system forms an important part of the public transport system in the city of Rio de Janeiro in Brazil.

You can help expand this article with text translated from the corresponding article in Portuguese. (February 2017) Click [show] for important translation instructions. View a machine-translated version of the Portuguese article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 1,518 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Portuguese Wikipedia article at [[:pt:BRT do Rio de Janeiro]]; see its history for attribution. You should also add the template {{Translated|pt|BRT do Rio de Janeiro}} to the talk page. For more guidance, see Wikipedia:Translation.

As of the end of 2015, there were 1,752 bus routes servicing the Rio de Janeiro Metropolitan Region, including 705 licensed by the municipality of Rio de Janeiro.^[1]

The City of Rio de Janeiro bus fleet is made up of over 8,000 vehicles, operated by 47 different companies.^[2]

BRT is a bus rapid transit system that, as of 2017, the consists of three operating lines, Transcarioca, Transoeste and Transolímpica.^[3] Two further lines, Translight [pt] and Transbrasil [pt] are in planning or under construction.