Mexico’s 32 federal entities, which include 31 states and Mexico City, range from densely packed megacities to sparsely inhabited desert and jungle territories. The State of Mexico alone accounts for more residents than many entire countries, while states like Baja California Sur and Colima are home to fewer than a million people each. That uneven distribution reflects centuries of economic development, geographic opportunity, migration patterns, and policy decisions that continue to reshape where Mexicans live and how state populations grow or shrink.
Where Most Mexicans Live
Mexico’s population, counted at roughly 126 million in the 2020 national census conducted by INEGI, is heavily concentrated in a handful of states. The State of Mexico (Estado de México), which wraps around the western, northern, and eastern edges of Mexico City, is the most populous entity in the country, with upward of 16 million residents. Much of that population lives in municipalities that function as suburbs of the capital, making the broader Mexico City metropolitan area the largest urban agglomeration in the Western Hemisphere.
Mexico City itself, a federal entity separate from the State of Mexico since 2016, reported about 9.2 million inhabitants in the 2020 count. Combined with the surrounding State of Mexico and parts of neighboring states, the metro zone is home to roughly one in every five Mexicans. Jalisco, anchored by the city of Guadalajara, comes in third with about 8.3 million people, followed closely by Veracruz at around 8.1 million. Puebla, Guanajuato, and Nuevo León each hover in the five-to-six million range, rounding out the group of states where population density is highest and economic activity most intense.
The Least Populated States
At the other end of the spectrum, several states remain remarkably lightly settled. Baja California Sur, the long peninsula stretching into the Pacific, had fewer than 800,000 people as of the 2020 census. Colima, Mexico’s smallest state by area outside of Mexico City, is similarly small in population, with about 730,000 residents. Campeche, Nayarit, and Tlaxcala also fall below the million-person mark, though for very different reasons: Campeche is vast and largely covered by tropical forest, while Tlaxcala is simply a geographically tiny state squeezed between Puebla and the State of Mexico.
These low population figures do not necessarily mean these states are stagnant. Baja California Sur has been one of Mexico’s fastest-growing entities in percentage terms over recent decades, driven by tourism development in places like Los Cabos and a steady stream of domestic migrants seeking employment in the hospitality sector. Small absolute numbers make percentage growth look dramatic, but the trend is real and reflects how tourism and infrastructure investment can transform a state’s demographic profile relatively quickly.
The Northern Border Boom
Mexico’s six northern border states, running from Tamaulipas in the east through Nuevo León, Coahuila, Chihuahua, Sonora, and Baja California in the west, have experienced dramatic population growth over the past several decades. Once a remote frontier region, northern Mexico now supports booming human populations and plays a key role in the country’s industrial and agricultural economy.1Oxford Scholarship Online. Recent History of Natural Resource Use and Population Growth in Northern Mexico The establishment of maquiladoras, manufacturing plants that assemble goods for export, pulled millions of workers northward starting in the 1960s. That trend accelerated after trade liberalization in the 1990s, and cities like Tijuana, Ciudad Juárez, and Monterrey grew into major metropolitan centers.
Nuevo León stands out in this group. Its capital, Monterrey, is Mexico’s wealthiest large city and a magnet for both domestic migrants and international investment. The state’s population has more than doubled since 1980, and it now ranks among the top ten most populated entities nationally. The northern border states collectively account for a disproportionate share of Mexico’s GDP relative to their population, which in turn feeds a cycle of migration, urbanization, and further growth. The pressures this places on water, land, and natural resources in an arid region are a persistent concern, one that researchers have flagged for decades.2Oxford Scholarship Online. Recent History of Natural Resource Use and Population Growth in Northern Mexico
Economic Clusters and Divergent Growth Trajectories
The relationship between population growth and economic output in Mexico is not the same everywhere. A study using annual data for all 32 states from 1940 to 2020 found that Mexican states cluster into at least four distinct groups based on the joint trajectory of their population growth and income per capita.3Latin American Economic Review. Population and Economic Growth in Mexico: Regime dynamics and causality In some clusters, population growth appeared to drive economic expansion. In others, the causal arrow pointed the other direction, with rising incomes preceding demographic change. The direction and strength of that relationship shifted at key historical turning points, particularly around periods when national population policy changed and fertility rates began declining.
This matters because it undercuts the common assumption that Mexico’s population story is a single national narrative. A state like Chiapas, with high fertility, widespread poverty, and limited industrialization, has followed a fundamentally different demographic path than a state like Querétaro, where manufacturing investment has drawn in young workers and pushed both population and income sharply upward. The four-cluster finding suggests that understanding any individual state’s population requires understanding its economic context, not just reading off a national trend line.4Latin American Economic Review. Population and Economic Growth in Mexico: Regime dynamics and causality
Emigration and Remittances
Population figures for individual states tell only part of the story, because millions of people born in Mexican states live and work abroad, overwhelmingly in the United States. The money they send back, known as remittances, reveals which states have lost the most working-age residents to emigration and which communities remain economically dependent on those absent workers. In 2021, remittances from the United States to Mexico totaled more than $48.9 billion, representing about 95% of all remittances received nationally. Most of that money originated in California and Texas.5Rice University’s Baker Institute for Public Policy. How Remittances Impact the Economies of Mexican States and Municipalities
On the receiving end, the states with the longest and deepest emigration traditions dominate. Jalisco received the largest share in 2021, about $5.2 billion, followed by Michoacán at $4.9 billion. Guanajuato also ranked among the top recipients.6Rice University’s Baker Institute for Public Policy. How Remittances Impact the Economies of Mexican States and Municipalities These three states share a geography in western and central Mexico where emigration to the U.S. dates back over a century, and where generations of families have maintained cross-border economic ties. The sheer volume of remittances means that population counts alone understate the economic reach of these states’ diasporas.
The vulnerability of this arrangement became clear during the early months of the COVID-19 pandemic. Research examining state-to-state remittance flows found significant regional variation in how the economic shock played out. Remittances from California and Texas proved resilient, continuing to benefit many Mexican states, while flows from New York to Puebla experienced a sharp decline.7Quality & Quantity. Estimation of state-to-state remittance flows from the US to Mexico Simulations suggested that if California and Texas remittances had dropped even half as steeply as those from New York, poorer southern and central states like Chiapas and Oaxaca would have taken a severe income hit.8Quality & Quantity. Estimation of state-to-state remittance flows from the US to Mexico For those states, remittances are not a bonus; they are a structural pillar of household income.
Tourism and Floating Populations
Official census figures capture permanent residents but miss the large transient populations that swell certain states seasonally or year-round. Quintana Roo, home to Cancún, the Riviera Maya, and Tulum, is the most dramatic example. The state barely existed as a populated territory in the mid-twentieth century: Cancún was a sandbar with a few hundred inhabitants when the Mexican government selected it for tourism development in the early 1970s. Today, Quintana Roo has roughly two million permanent residents, but that number understates the human footprint on the ground at any given moment.
The constant flow of tourists creates what researchers call a “floating population,” a mass of people who use infrastructure, generate waste, consume water, and require services but do not appear in census counts. In places like Tulum, the growth of both permanent and floating populations is increasing the need for waste collection and processing and making communities more vulnerable to environmental strain.9IntechOpen. Risks and Threats on the Coast of Quintana Roo: The Case of Tulum, México This has practical consequences for urban planning, water management, and public health. A state may look moderately populated on paper while functioning, in terms of resource demand, like a much larger one.
Baja California Sur and Oaxaca face similar dynamics on a smaller scale. Los Cabos attracts a steady stream of international visitors, while Oaxaca City and the coast at Huatulco and Puerto Escondido draw domestic and international tourists in growing numbers. For states trying to plan infrastructure and public services, the mismatch between census population and actual daily population creates persistent headaches.
Health Spending and the Population Without Social Security
How state populations are served by public health systems varies enormously, and the gap follows a pattern tied to employment formality. Mexico’s social security system, anchored by the IMSS (Mexican Social Security Institute), covers workers in the formal economy and their families. But more than half the national population falls outside that system, either working informally, unemployed, or self-employed in agriculture and services.10International Journal for Equity in Health. Health financing inequality in fragmented health systems: evidence from Mexico, 2000-2023
In the year 2000, public health spending per person for people without social security was about 2,670 Mexican pesos, compared to 8,400 pesos for those with coverage, a ratio of more than three to one. That gap narrowed considerably over two decades of reform, but by 2023 the population without social security still received less per capita: about 4,350 pesos compared to 4,960 for the insured group.11International Journal for Equity in Health. Health financing inequality in fragmented health systems: evidence from Mexico, 2000-2023 The states where informality is highest, particularly in the south and in rural areas like Chiapas, Guerrero, and Oaxaca, bear the heaviest burden of this disparity. Residents of those states are both poorer and less likely to have access to a fully funded health system.
For anyone comparing state populations and wondering why certain southern states lag economically despite growing populations, health infrastructure is one piece of the answer. A state can have millions of residents and still function with a health system designed for a fraction of them. That gap between the population on paper and the population effectively served shapes outcomes in education, labor productivity, and quality of life.
Southern Border States and Transit Migration
While the northern border states draw internal migrants seeking factory jobs, the southern border states of Chiapas, Tabasco, and Campeche experience a different kind of population pressure: transit migration from Central America and beyond. Chiapas, which shares a long border with Guatemala, has been a primary entry point for migrants heading north for decades. The resident population of Chiapas is about 5.5 million, but the state’s infrastructure also bears the weight of a constantly shifting population of people in transit.
Mexico’s Programa Frontera Sur, launched in 2014 with substantial U.S. funding, established mobile checkpoints, detention centers, and increased monitoring of key migration corridors in the south, including the freight train networks that migrants had long used to travel northward.12REMHU: Rev. Interdiscip. Mobil. Hum. The tightrope of transit and containment: A comparative scoping review of international migration to Chiapas and the Canary Islands (1991-2021) The program’s stated goals included regularizing transit, improving border security, and protecting migrants, but critics have argued that its practical effect has been a policy of containment directed primarily at Central Americans, shaped heavily by pressure from the United States.13REMHU: Rev. Interdiscip. Mobil. Hum. The tightrope of transit and containment: A comparative scoping review of international migration to Chiapas and the Canary Islands (1991-2021)
The result for Chiapas and neighboring Tabasco is that their demographic reality extends well beyond what the census captures. Shelters, informal settlements, and border towns absorb thousands of people who may stay for weeks or months before moving on. This strains services in states that are already among Mexico’s poorest and adds a political dimension to population statistics: counting who lives in these states and who is passing through is an inherently fraught exercise.
Urban Concentration and Rural Decline
Across nearly every state, population growth has been overwhelmingly urban. Mexico went from a predominantly rural country in the mid-twentieth century to one where roughly four out of five people live in urban areas today. The states where this shift has been most complete are those with major metropolitan centers: the State of Mexico, Jalisco, Nuevo León, and Puebla. In those places, a single metro area often accounts for the vast majority of the state’s total population.
Rural municipalities, meanwhile, have stagnated or shrunk in absolute terms in many states. This is especially visible in states with high emigration, like Zacatecas, Durango, and Michoacán, where small farming towns have lost much of their working-age population to northern Mexican cities or the United States. The people who remain tend to be older, which pushes fertility down further and creates a self-reinforcing cycle of decline. Census-to-census comparisons of these rural municipalities often show population drops of 10% or more per decade, even as the state’s overall number holds roughly steady thanks to urban growth elsewhere within its borders.
This urban-rural divide means that state-level population figures can be misleading if you are trying to understand what life looks like on the ground. A state with five million people and one dominant city is a very different place than a state with five million people spread across dozens of mid-sized towns. Veracruz, for example, has a large population but no single overwhelming metro area; its residents are distributed among port cities, agricultural towns, and mountain communities in a pattern quite unlike the centralized layout of Nuevo León around Monterrey.
Indigenous Populations and the Geography of Language
Mexico’s indigenous population, estimated at roughly 12 million people who speak an indigenous language, plus millions more who identify as indigenous without speaking one, is concentrated in specific states. Oaxaca has the highest proportion of indigenous-language speakers relative to its total population, followed by Yucatán, Chiapas, Quintana Roo, and Guerrero. In absolute numbers, the State of Mexico and Mexico City also have large indigenous populations, drawn by urban employment, but those residents make up a much smaller share of those entities’ overall demographics.
This geographic concentration matters because indigenous populations in Mexico face systematically worse outcomes in health, education, and income. When you see that Oaxaca or Chiapas rank at the bottom of nearly every development index despite having populations in the millions, the overlap with indigenous demography is not a coincidence. It reflects historical patterns of marginalization, land dispossession, and underinvestment that persist in measurable ways. State population figures, then, are not just numbers. They carry embedded information about who lives where and under what conditions, and that context is essential for reading them honestly.