Rio de Janeiro ("Odo January", Pípè: /ˈriːoʊ dɪ ʒəˈnɛəroʊ/; Pípè ni Potogí: [ˈxiu dʒi ʒaˈneiɾu]) je oluilu Ipinle Rio de Janeiro, ilu to tobijulo keji ni ile Brasil ati agbegbe ilu to tobijulo keta ni Guusu Amerika. Rio de Janeiro ti je oluilu Brasil fun bi ogorun meji lati 1763 titi di 1822 ni igba imunisin awon ara Portugal, ati nigbati Brasil di ominira ni 1822 titi di 1960. O tun je oluilu ti tele fun Ile-Oba Portugal (1808–1821). O gbajumo gege bi "Rio" ni soki, alaje re ni A Cidade Maravilhosa, tabi "Ilu Alara". Coordinates: 22°54′S 43°14′W﻿ / ﻿22.900°S 43.233°W﻿ / -22.900; -43.233﻿ (Rio de Janeiro) R.L. Forstall, R.P. Greene, and J.B. Pick, "Which are the largest? Why published populations for major world urban areas vary so greatly", City Futures Conference, (University of Illinois at Chicago, July 2004) – Table 5 (p.34) UN list of largest agglomerations The United Nations.