Monaco led the ranking for countries with the highest population density in 2024, with nearly 26,000 residents per square kilometer. The Special Administrative Region Macao came in second, followed by Singapore. The world’s second smallest country Monaco is the world’s second smallest country, with an area of about two square kilometers, and its population only numbers around 40,000. It is a constitutional monarchy located by the Mediterranean Sea, and while Monaco is not part of the European Union, it does participate in some EU policies. The country is perhaps most famous for the Monte Carlo casino and for hosting the Monaco Grand Prix, the world's most prestigious Formula One race. The global population Globally, the population density per square kilometer stands at about 60 inhabitants, and Asia is the most densely populated region in the world. The global population is increasing rapidly, so population density is only expected to increase as well. In 1950, for example, the global population stood at about 2.54 billion people, and it reached over eight billion during 2023.

In 2023, Washington, D.C. had the highest population density in the United States, with 11,130.69 people per square mile. As a whole, there were about 94.83 residents per square mile in the U.S., and Alaska was the state with the lowest population density, with 1.29 residents per square mile. The problem of population density Simply put, population density is the population of a country divided by the area of the country. While this can be an interesting measure of how many people live in a country and how large the country is, it does not account for the degree of urbanization, or the share of people who live in urban centers. For example, Russia is the largest country in the world and has a comparatively low population, so its population density is very low. However, much of the country is uninhabited, so cities in Russia are much more densely populated than the rest of the country. Urbanization in the United States While the United States is not very densely populated compared to other countries, its population density has increased significantly over the past few decades. The degree of urbanization has also increased, and well over half of the population lives in urban centers.

Mogadishu in Somalia led the ranking of cities with the highest population density in 2023, with 33,244 residents per square kilometer. When it comes to countries, Monaco is the most populated state worldwide.

The average for 2021 based on 27 countries was 187 people per square km. The highest value was in Malta: 1620 people per square km and the lowest value was in Finland: 18 people per square km. The indicator is available from 1961 to 2021. Below is a chart for all countries where data are available.

This graph shows the population density of the United States of America from 1790 to 2019. In 2019, the population density was approximately 92.9 residents per square mile of land area. Population density in the United States Population density has been tracked for over two hundred years in the United States. Over the last two centuries, the number of people living in the United States per square mile has grown from 4.5 in 1790 to 87.4 in 2010. After examining the data in detail, it becomes clear that a major population increase started around 1870. Population density was roughly 11 at the time and has doubled in the last century. Since then, population density grew by about 16 percent each decade. Population density doubled in 1900, and grew in total by around 800 percent until 2010.

The population density of the United States varies from state to state. The most densely populated state is New Jersey, with 1,208 people per square mile living there. Rhode Island is the second most densely populated state, with slightly over 1,000 inhabitants per square mile. A number of New England states follow at the top of the ranking, making the northeastern region of the United States the most densely populated region of the country.

The least populated U.S. state is the vast territory of Alaska. Only 1.3 inhabitants per square mile reside in the largest state of the U.S.

Compared to other countries around the world, the United States does not rank within the top 50, in terms of population density. Most of the leading countries and territories are city states. However, the U.S. is one of the most populous countries in the world, with a total population of over 327 million inhabitants, as of 2018.

This statistics shows a ranking of the metropolitan areas in the United States in 2013 with the highest population density. As of 2013, Los Angeles-Long Beach-Anaheim in California was ranked first with a population density of 1,046 inhabitants per square kilometer.

As of July 2022, Monaco is the country with the highest population density worldwide with an estimated population of nearly 24,500 per square kilometer. However, by 2050, it is expected to be overtaken by the Special Administrative Region of Macao.

This data set included population and expenditure breakdowns by LGA, demographic statistics, labor statistics and Socio Economis Indexes for Areas (SEIFA) LGA score and ranking per LGA.

Detailed descriptions of this data set include:
- LGA name
- LGA code
- Region
- Total Net Expenditure
- SEIFA DIS RANK State
- SEIFA DIS RANK Country
- SEIFA DIS RANK Metro
- SEIFA ADV DIS Score
- SEIFA ADV DIS RANK State
- SEIFA ADV DIS RANK Country
- SEIFA ADV DIS RANK Metro
- Adult population
- Adult population per venue
- EGM numbers per 1000 adults
- Expenditure per adult
- Workforce
- Unemployment
- Unemployment rate

Contained within the Atlas of Canada Poster Map Series, is a poster showing population density across Canada. There is a relief base to the map on top of which is shown all populated areas of Canada where the population density is great than 0.4 persons per square kilometer. This area is then divided into five colour classes of population density based on Statistics Canada's census divisions.

Canada, with 3.33 people per square kilometre, has one of the lowest population densities in the world. In 2001, most of Canada's population of 30,007,094 lived within 200 kilometres of the United States (along Canada's south). In fact, the inhabitants of our three biggest cities -- Toronto, Montréal and Vancouver -- can drive to the border in less than two hours. Thousands of kilometres to the north, our polar region -- the Yukon, the Northwest Territories and Nunavut -- is relatively empty, embracing 41% of our land mass but only 0.3% of our population. An inset map shows in greater detail the Windsor-Québec Corridor where a high concentration of Canadians live.

As of 2023, the top five most densely populated cities in Latin America and the Caribbean were in Colombia. The capital, Bogotá, ranked first with over 18,241 inhabitants per square kilometer.

Chart and table of Sri Lanka population density from 1950 to 2025. United Nations projections are also included through the year 2100.

As of 2021, Asia was the most densely populated region of the world with nearly 150 inhabitants per square kilometer, whereas Oceania's population density was just over five inhabitants per square kilometer. Worldwide, the population density was 60 people per square kilometer.

This table presents the 2021 and 2016 population and dwelling counts, land area, population density and population ranking for census subdivisions, as well as the percentage change in the population and dwelling counts between 2016 and 2021.

Chart and table of Canada population density from 1950 to 2025. United Nations projections are also included through the year 2100.

The majority of the Canadian population, about 60% is concentrated within a thin belt of land representing 2.2% of the land between Windsor, Ontario and Quebec City. Even though Canada is the second largest country in the world in terms of land area, it only ranks 33rd in terms of population. The agricultural areas in the Prairies and eastern Canada have higher population densities than the sparsely populated North, but not as high as southern Ontario or southern Quebec.

In 2021, El Salvador had the highest population density in Central America, with over 300 people per square kilometer. The second place was Guatemala, slightly over half the density in El Salvador. In 2022, Guatemala ranked as the most populated country in the region, with over 18 million inhabitants.

Chart and table of Iceland population density from 1950 to 2025. United Nations projections are also included through the year 2100.

Singapore SG: Population Density: People per Square Km data was reported at 7,915.731 Person/sq km in 2017. This records an increase from the previous number of 7,908.721 Person/sq km for 2016. Singapore SG: Population Density: People per Square Km data is updated yearly, averaging 4,374.479 Person/sq km from Dec 1961 (Median) to 2017, with 57 observations. The data reached an all-time high of 7,915.731 Person/sq km in 2017 and a record low of 2,540.896 Person/sq km in 1961. Singapore SG: Population Density: People per Square Km data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Singapore – Table SG.World Bank.WDI: Population and Urbanization Statistics. Population density is midyear population divided by land area in square kilometers. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin. Land area is a country's total area, excluding area under inland water bodies, national claims to continental shelf, and exclusive economic zones. In most cases the definition of inland water bodies includes major rivers and lakes.; ; Food and Agriculture Organization and World Bank population estimates.; Weighted average;

The USACE SACS Population and Infrastructure Exposure Index combines the normalized score of each Infrastructure and Population Index, and then re-normalizes these values across the study area.

The SACS Infrastructure Exposure Index was created by spatially joining 52 infrastructure datasets from DHS’s HIFLD database and Military Installation Ranges and Training Areas from the DOD OSD to census tracts across the study area. The infrastructure elements were assigned a weighting value consistent with the NACCS Tier 1 Methodology (URL). The weighted infrastructure element values were then aggregated by count within each census tract, and then divided by the census tract area to generate an infrastructure density value. This infrastructure density value was then enumerated and ranked across all census tracts, and normalized to 0 to 1 using these rankings. The census tract feature dataset was then converted to a grid using these normalized values for aggregation with other SACS datasets.

The SACS Population Exposure Index depicts the 2015 Census – American Community Survey data as population density. This population density is calculated as persons per square mile, per census tract. The census tracts depicted are within the USACE South Atlantic Coastal Study boundaries with an inland extent of NOAA’s Category 5 Maximum of Maximum Storm Surge Hazard Layer. The index ranks all census tracts within the SACS study area on a percentile index by population density. These data are represented on a normalized scale of 0 to 1, with 1 being the most densely populated census tract in the study area, and zero being the least densely populated census tract. The census tract feature dataset was then converted to a grid using these normalized values for aggregation with other SACS datasets.

References: DHS HIFLD https://gii.dhs.gov/hifld/

DOD OSD https://www.acq.osd.mil/dodsc/fast41_gisdatasets.html

US Census https://www.census.gov/

NACCS (appendix C, page 107) https://www.nad.usace.army.mil/Portals/40/docs/NACCS/NACCS_Appendix_C.pdfThis Tier 1 dataset is available for download here:Tier 1 Risk Assessment Download