Detroit
Demographics

In the 2020 United States Census, the city had 639,111 residents, ranking it the 27th most populous city in the United States. Of the large shrinking cities in the United States, Detroit has had the most dramatic decline in the population of the past 70 years (down 1,210,457) and the second-largest percentage decline (down 65.4%). While the drop in Detroit's population has been ongoing since 1950, the most dramatic period was the significant 25% decline between the 2000 and 2010 Census.

Detroit's 639,111 residents represent 269,445 households, and 162,924 families residing in the city. The population density was 5,144.3 people per square mile (1,986.2 people/km). There were 349,170 housing units at an average density of 2,516.5 units per square mile (971.6 units/km). Of the 269,445 households, 34.4% had children under the age of 18 living with them, 21.5% were married couples living together, 31.4% had a female householder with no husband present, 39.5% were non-families, 34.0% were made up of individuals, and 3.9% had someone living alone who was 65 years of age or older. The average household size was 2.59, and the average family size was 3.36.

There was a wide distribution of age in the city, with 31.1% under the age of 18, 9.7% from 18 to 24, 29.5% from 25 to 44, 19.3% from 45 to 64, and 10.4% 65 years of age or older. The median age was 31 years. For every 100 females, there were 89.1 males. For every 100 females age 18 and over, there were 83.5 males.
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