| Gran Buenos Aires | |
| Official Name: | Greater Buenos Aires |
| Subdivision Type: | Country |
| Seat Type: | Core city |
| Seat: | Buenos Aires |
| Population: | 10,865,182 (24 partidos) |
| Population Metro: | 13,985,794 (including the Federal District and 24 partidos) |
| Area Metro Km2: | 3,833 |
| Population As Of: | INDEC 2022 Census |
| Population Density Metro Km2: | 3926.1 |
| Demographics Type1: | GDP (PPP, constant 2015 values) |
| Demographics1 Title1: | Year |
| Demographics1 Info1: | 2023 |
| Demographics1 Title2: | Total |
| Demographics1 Info2: | $356.8 billion[1] |
| Demographics1 Title3: | Per capita |
| Demographics1 Info3: | $23,000 |
Greater Buenos Aires (Spanish; Castilian: Gran Buenos Aires, GBA), also known as the Buenos Aires Metropolitan Area (Spanish; Castilian: Área Metropolitana de Buenos Aires, AMBA),[2] refers to the urban agglomeration comprising the Autonomous City of Buenos Aires and the adjacent 24 partidos (districts) in the Province of Buenos Aires. Thus, it does not constitute a single administrative unit. The conurbation spreads south, west and north of Buenos Aires city. To the east, the River Plate serves as a natural boundary.
Urban sprawl, especially between 1945 and 1980, created a vast metropolitan area of over 3,800 km² (1,500 mi²)[3] - or 19 times the area of Buenos Aires proper. The 24 suburban partidos (counties) grew more than six-fold in population between the 1947 and 2022 censuses - or nearly 2.5% annually, compared to 1.4% for the nation as a whole.[4] [5]
While annual growth for the suburban area slowed to 0.8% between 2010 and 2022, the 14 million inhabitants in the entire 30-county area plus the City of Buenos Aires account for a third of the total population of Argentina and generate nearly half (48%) of the country's GDP.[3]
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The term Gran Buenos Aires ("Greater Buenos Aires") was first officially used in 1948, when Governor of Buenos Aires Province Domingo Mercante signed a bill delineating as such an area covering 14 municipalities surrounding the City of Buenos Aires.[6] The term is also related to other expressions that are not necessarily well-defined: the "Buenos Aires' conurbation" (Conurbano Bonaerense), the "Greater Buenos Aires Agglomeration" (Aglomerado Gran Buenos Aires), and the "Metropolitan Area of Buenos Aires" (Área Metropolitana Buenos Aires, AMBA). In colloquial speech, people refer to the "Buenos Aires' conurbation" as the set of municipalities that surround the City of Buenos Aires, and which are mostly populated by working-class or middle-class communities.
The National Institute of Statistics and Censuses (INDEC) has defined Greater Buenos Aires.[7] There are three main groups within the Buenos Aires conurbation. The first two groups (24 partidos) comprise the traditional conurbation, or the "conurbation proper", while the third group of six partidos is in the process of becoming fully integrated with the rest.
| Rank | Partido | Seat | [8] | |||
|---|---|---|---|---|---|---|
| Buenos Aires | 2,890,151 | 4.1 | 3,120,612 | 8.0 | ||
| 1 | La Matanza | San Justo | 1,775,816 | 41.5 | 1,837,774 | 3.5 |
| 2 | Lomas de Zamora | Lomas de Zamora | 616,279 | 4.2 | 694,330 | 12.7 |
| 3 | Quilmes | Quilmes | 582,943 | 12.4 | 636,026 | 9.1 |
| 4 | Almirante Brown | Adrogué | 552,902 | 7.2 | 585,852 | 6.0 |
| 5 | Merlo | Merlo | 528,494 | 12.4 | 580,806 | 9.9 |
| 6 | Moreno | Moreno | 452,505 | 18.9 | 574,374 | 26.9 |
| 7 | Florencio Varela | Florencio Varela | 426,005 | 22.1 | 497,818 | 16.9 |
| 8 | Lanús | Lanús | 459,263 | 1.4 | 462,051 | 0.6 |
| 9 | General San Martín | San Martín | 414,196 | 2.8 | 450,335 | 8.7 |
| 10 | Tigre | Tigre | 376,381 | 25.0 | 447,785 | 19.0 |
| 11 | Avellaneda | Avellaneda | 342,677 | 4.2 | 370,939 | 8.2 |
| 12 | Tres de Febrero | Caseros | 340,071 | 1.1 | 366,377 | 7.7 |
| 13 | Berazategui | Berazategui | 324,344 | 12.6 | 360,582 | 11.2 |
| 14 | Malvinas Argentinas | Los Polvorines | 322,375 | 10.9 | 351,788 | 9.1 |
| 15 | Esteban Echeverría | Monte Grande | 300,959 | 23.4 | 339,030 | 12.6 |
| 16 | Morón | Morón | 321,109 | 3.8 | 334,178 | 4.1 |
| 17 | San Miguel | San Miguel | 276,190 | 9.1 | 326,215 | 18.1 |
| 18 | José C. Paz | José C. Paz | 265,981 | 15.5 | 323,918 | 21.8 |
| 19 | San Isidro | San Isidro | 292,878 | 0.5 | 298,777 | 2.0 |
| 20 | Vicente López | Olivos | 269,420 | -1.7 | 283,510 | 5.2 |
| 21 | Ezeiza | Ezeiza | 163,722 | 37.8 | 203,283 | 24.2 |
| 22 | Hurlingham | Hurlingham | 181,241 | 5.2 | 187,122 | 3.2 |
| 23 | Ituzaingó | Ituzaingó | 167,824 | 6.1 | 179,788 | 7.1 |
| 24 | San Fernando | San Fernando | 163,240 | 8.0 | 172,524 | 5.7 |