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Compare cities by people per square mile12/30/2023 ![]() ![]() This includes all continental and island land area, including Antarctica. However, if only the Earth's land area of 150,000,000 km 2 (58,000,000 sq mi) is taken into account, then human population density is 53/km 2 (140/sq mi). Therefore, from this very crude type of calculation, the worldwide human population density is approximately 8,000,000,000 ÷ 510,000,000 = 16/km 2 (41/sq mi). Commonly this is calculated for a county, city, country, another territory or the entire world. Population density is the number of people per unit of area, usually transcribed as "per square kilometer" or square mile, and which may include or exclude, for example, areas of water or glaciers. Main article: List of countries and dependencies by population density Increased problems with locating sexual mates.Examples of the causes of reduced fertility in low population densities are: This is called the Allee effect after the scientist who identified it. Low densities may cause an extinction vortex and further reduce fertility. Population density is population divided by total land area, sometimes including seas and oceans, as appropriate. In simple terms, population density refers to the number of people living in an area per square kilometre, or other unit of land area. It is mostly applied to humans, but sometimes to other living organisms too. Population density (in agriculture: standing stock or plant density) is a measurement of population per unit land area. In relation to the equator it is seen that the vast majority of human population lives in the Northern Hemisphere, as 67% of Earth's land area is there. However, at the time of this post, the most recent CPD annual crime report on their website was for 2011.Population density (people per square kilometre) map of the world in 1994. ![]() The media may be reacting to non-UCR sources such as crime statistics published by the Chicago Police Department (CPD). With all of the above in mind, it’s important to remember that the most recent UCR (for 2014 at the time of this post) is always several months behind. So violent crime by geographic size does not put Chicago on top either. The graph below shows the violent crime rate by geographic size for the same nine U.S. Violent Crime Rate = (Violent Crimes / Square Miles)Ĭity A: (10 violent crimes / 100 square miles) = 0.1 violent crime per square mileĬity B: (10 violent crimes / 1,000 square miles) = 0.01 violent crime per square mile But what if the media was using a different measure? What if they were using geographic size rather than population? If we calculate the violent crime rate for the same cities using geographic size rather than population, would Chicago be the most violent?įor this analysis, we need to tweak the violent crime rate formula as follows: cities based population, and Chicago is not the worst as the media would have you believe. So the above graph shows that there is significant variation in violent crime risk among U.S. Las Vegas is in the top 10 most populous cities, but was excluded because the Las Vegas Metropolitan Police Department covers a far larger geographic area (7,560 square miles) as compared to the other cities in this analysis. The graph below shows the violent crime rate for nine of the 10 most populous U.S. Violent Crime Rate = (Violent Crimes / Population) x 1,000įor example, you can compare two cities (City A and City B) as follows:Ĭity A: (10 violent crimes / 10,000 people) = 0.001 x 1,000 = 1 violent crime per 1,000 peopleĬity B: (10 violent crimes / 100,000 people) = 0.0001 x 1,000 = 0.1 violent crime per 1,000 people To calculate a violent crime rate for a city, we use the following formula: When comparing crime statistics for cities, it is common to calculate violent crime rates using population as a common denominator. As such, the analysis below is for 2014 crimes. As such, the UCR is typically published in September of the following year. Though the UCR is published annually, it takes time to verify and finalize the data. The FBI’s Uniform Crime Report (UCR) is published annually and includes the number of violent crimes by city. The Federal Bureau of Investigation (FBI) defines violent crime as murder, rape, robbery, and aggravated assault. cities, you’ll find that Chicago is not the most violent by any measure. If you compare the violent crime rates for large U.S. I’m amazed that the media pays so much attention to violence in Chicago and ignores cities with more violence. ![]()
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