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GreaterRio de Janeiro, officially theRio de Janeiro Metropolitan Region (Grande Rio, officiallyRegião Metropolitana do Rio de Janeiro, inPortuguese) is a largemetropolitan area located inRio de Janeirostate in Brazil, the second largest inBrazil and third largest in South America. It consists of 22municipalities, including the state capital,Rio de Janeiro.
The metropolitan area of Rio de Janeiro is known as a historical, cultural and economic centre of Brazil, with a total population of 12 million inhabitants. The region was first officially defined on July 1, 1974, less than 1 year before the fusion ofGuanabara intoRio de Janeiro. Several municipalities show a high level ofconurbation, withRio de Janeiro–Baixada Fluminense andNiterói–São Gonçalo being the most clear examples. It was changed several times to include or remove different cities in different moments of the history, in the years 1993, 2001, 2002, 2009, 2013 and 2018.
Thewater supply plans of the region are coordinated, and transportation in the area is heavily interconnected with urban intermunicipal buses to all municipalities in the area,trains over the capital to someBaixada Fluminense municipalities, ferry boats to some of theGuanabara Baymunicipalities and major inter-cityfreeways such as theRio–Niterói Bridge,Red Line,President Dutra freeway and theNiterói-Manilha freeway (pt). Most transportation methods are integrated with the capital inner-transportation system of buses,trains,metro,freeways andexpressways.
1,000,000+
400,000 – 999,999
100,000 – 399,999
0 - 100,000
The 22 municipalities of the area are:[4]
| Municipality | Area (km²) | Population (2000 Census) | Population (2010 Census)[5] | Population (2022 Census)[6] | Population density 2022 (/km²) |
|---|---|---|---|---|---|
| Belford Roxo | 79.791 | 434,474 | 469,261 | 483,087 | 6,054.40 |
| Cachoeiras de Macacu | 955.806 | 48,543 | 54,273 | 56,943 | 59.58 |
| Duque de Caxias | 464.573 | 775,456 | 855,046 | 808,152 | 1,739.56 |
| Guapimirim | 356.566 | 37,952 | 51,487 | 51,696 | 144.98 |
| Itaboraí | 430.375 | 187,479 | 218,090 | 224,267 | 521.10 |
| Itaguaí | 273.414 | 82,003 | 109,091 | 116,841 | 427.34 |
| Japeri | 82.454 | 83,278 | 95,391 | 96,289 | 1,167.79 |
| Magé | 385.700 | 205,830 | 228,150 | 228,127 | 591.46 |
| Maricá | 362.571 | 76,737 | 12,761 | 197,300 | 544.17 |
| Mesquita | 41.490 | no data | 168,403 | 167,128 | 4,028.15 |
| Nilópolis | 19.157 | 153,712 | 157,483 | 146,774 | 7,661.64 |
| Niterói | 129.375 | 459,451 | 487,327 | 481,758 | 3,723.73 |
| Nova Iguaçu | 520.807 | 920,599 | 797,212 | 785,822 | 1,508.85 |
| Paracambi | 179.374 | 40,475 | 47,124 | 41,375 | 230.66 |
| Petrópolis | 795.798 | 286,537 | 295,917 | 278,881 | 350.44 |
| Queimados | 75.701 | 121,993 | 137,938 | 140,523 | 1,856.29 |
| Rio Bonito | 462.156 | 49,691 | 55,551 | 56,276 | 121.77 |
| Rio de Janeiro | 1,221.000 | 5,857,904 | 6,323,037 | 6,211,423 | 5,087.16 |
| São Gonçalo | 249.143 | 891,119 | 1,013,901 | 896,744 | 3,599.31 |
| São João de Meriti | 34.838 | 449,476 | 459,356 | 440,962 | 12,657.50 |
| Seropédica | 283.794 | 65,260 | 78,183 | 80,596 | 283.99 |
| Tanguá | 145.503 | 26,057 | 30,731 | 31,086 | 213.65 |
| Metropolitan Rio Janeiro | 7,549.386 | 10,670,040 | 12,603,936 | 12,022,050 | 1,592.45 |
22°54′10″S43°12′28″W / 22.9028°S 43.2078°W /-22.9028; -43.2078