Is the interior backward? Data from 5,570 municipalities debunk the myth — São Caetano do Sul proves it
By Eduardo Mendes··Automatically translated from Portuguese
The city with the highest HDI in Brazil is not São Paulo, Rio de Janeiro or Brasília. It is São Caetano do Sul (SP), with only 161 thousand inhabitants and an index of 0.862 — higher than countries like Portugal (0.866), Chile (0.860) and Hungary (0.846) according to UNDP 2023. The data is not an exception: an analysis of 5,570 Brazilian municipalities reveals that the interior concentrates islands of human excellence that narratives about the "backwardness" of the interior systematically ignore.
The narrative of the "backward interior" has traversed decades of political and cultural debate in Brazil. But when data from all municipalities are placed side by side, the panorama is radically different. Of the 20 cities with the highest HDI in the country, 17 are outside the three largest capitals. Geographic prejudice has real cost: it discourages investments, qualified migration and public policies where they could have greater impact.
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Interior vs. Capitals: what the numbers really say
The analysis of the Atlas of Human Development in Brazil (UNDP/IPEA/FJP) shows that the average HDI of Brazilian municipalities with population between 50 thousand and 500 thousand inhabitants is 0.731 — identical to the average HDI of state capitals (0.732). The statistically insignificant difference dismantles the premise that interior = backwardness.
What actually exists is intra-regional inequality: the 1,000 municipalities with the lowest HDI in Brazil are concentrated in the northeastern semiarid region and in the north of the Amazon — regions with historical challenges of isolation and infrastructure, but which have nothing to do with the generic narrative of the "backward interior". São Caetano do Sul is 15 km from Avenida Paulista. Águas de São Pedro is in the interior of São Paulo. Vinhedo is interior. Maringá is interior. All surpass capitals in HDI.
The phenomenon of "islands of excellence"
IPEA researchers identified 347 Brazilian municipalities with HDI above 0.750 — the threshold for high human development — that are completely outside the metropolitan regions of the three largest capitals. These municipalities are often economically specialized: Vinhedo (SP) and Campinas (SP) in technology and cutting-edge industry; Maringá (PR) and Londrina (PR) in high-productivity agribusiness; Joinville (SC) and Uberlândia (MG) in industrial manufacturing.
The common pattern: cities that developed economic specializations, invested in quality public education, and maintained manageable urban costs created living conditions superior to those of metropolises for a significant portion of the population.
Why does the narrative persist despite the data?
The persistence of the myth has a sociological explanation. Brazilian cultural and journalistic production is concentrated in the Rio-São Paulo axis, creating selection bias in coverage. Municipalities like Ribeirão Preto, Sorocaba, or Maringá rarely appear in reports about quality of life, despite surpassing European cities in some indicators. The result is a public perception disconnected from the country's territorial reality.
Methodology and sources
Municipal HDI data comes from the Atlas of Human Development in Brazil (UNDP Brazil, IPEA and João Pinheiro Foundation, 2023 version), based on IBGE Demographic Census 2022. Per capita GDP data are from the IBGE Regional Accounts System (2022 reference, deflated to 2024). Population data from IBGE Census 2022. The classification "interior" or "capital" follows IBGE administrative definition.
Frequently asked questions about HDI in inland Brazil
Which city in inland Brazil has the highest HDI?
Águas de São Pedro (SP) has the highest HDI among municipalities typically classified as "inland" Brazil, with an index of 0.854 (Brazil Atlas 2023). São Caetano do Sul (SP), although part of the São Paulo metropolitan region, has the highest absolute HDI in the country (0.862) and is frequently cited as a reference for inland São Paulo due to its scale and characteristics.
Does inland Brazil have lower HDI than capitals?
Not in a generalized way. The average HDI of municipalities with 50 thousand to 500 thousand inhabitants is 0.731, virtually identical to that of state capitals (0.732). There are inland municipalities with higher HDI than capitals like Manaus (0.737), Belém (0.746), São Luís (0.768), and Maceió (0.721). The real problem is inequality within regions, not between inland and capital as generic categories.
Which states in inland Brazil have the best development indicators?
Santa Catarina leads: it has the best average municipal HDI in Brazil, with emphasis on Joinville, Balneário Camboriú, and Florianópolis. Paraná comes next, with Curitiba, Maringá, and Londrina among the best. Inland São Paulo — especially the Campinas-Ribeirão Preto-São José dos Campos axis — concentrates municipalities with per capita GDP and HDI above the national average.
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