The Miami metropolitan area includes Miami-Dade, Broward and Palm Beach counties, which together had a combined population of more than 5.5 million people. As of the U.S. Census of 2000, there were 362,470 people living in 134,198 households, and there were 83,336 families residing in the city. The population density was 10,160.9 people living in each square mile, and 148,388 housing units at an average density of 4,159.7 per square mile.
Breaking down the 158,297 households, 26.3% of them had children under the age of 18 as residents, 36.6% were married couples who co-habitate, 18.7% had a female head of household, and 37.9% were unrelated sharing the household. Of all households, 30.4% were made up of individuals, and 12.5% were individuals 65 years of age or older and living alone. The average household size was 2.61 people, and the average family size was 3.25.
Miami’s age distribution was spread out with 21.7% of resident being under the age of 18, 8.8% were from 18 to 24 years old, and 30.3% ranged from 25 to 44 in age. Rounding out the age groups, 22.1% of Miami’s residents were aged from 45 to 64 years, and 17.0% were 65 years of age or older. The median age of all Miami residents was 38 years. For every 100 females in Miami, there were 98.9 males, and for every 100 females age 18 and over, there were 97.3 males.