Plymouth is a city in Wayne County in the U.S. state of Michigan. The population was 9,132 at the 2010 census. The city of Plymouth is entirely surrounded by Plymouth Charter Township but both are administered autonomously.
According to the United States Census Bureau, the city has a total area of 2.22 square miles (5.75 km), of which 2.21 square miles (5.72 km) is land and 0.01 square miles (0.03 km) is water. It is located 15.6 miles (25.1 km) east of Ann Arbor and 26.3 miles (42.3 km) west of Detroit, just south of the M-14 highway and west of Interstate 275.
As of the census of 2010, there were 9,132 people, 4,314 households, and 2,218 families residing in the city. The population density was 4,132.1 inhabitants per square mile (1,595.4/km). There were 4,652 housing units at an average density of 2,105.0 per square mile (812.7/km). The racial makeup of the city was 94.2% White, 1.6% African American, 0.3% Native American, 2.2% Asian, 0.4% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 1.8% of the population.
There were 4,314 households, of which 25.7% had children under the age of 18 living with them, 40.6% were married couples living together, 7.9% had a female householder with no husband present, 2.9% had a male householder with no wife present, and 48.6% were non-families. 42.4% of all households were made up of individuals and 13.2% had someone living alone who was 65 years of age or older. The average household size was 2.08 and the average family size was 2.93.
The median age in the city was 39.2 years. 21.5% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 31.8% were from 25 to 44; 27% were from 45 to 64; and 14% were 65 years of age or older. The gender makeup of the city was 48.0% male and 52.0% female.
As of the census of 2000, there were 9,022 people, 4,322 households, and 2,277 families residing in the city. The population density was 4,048.6 per square mile (1,562.1/km). There were 4,498 housing units at an average density of 2,018.4 per square mile (778.8/km). The racial makeup of the city was 96.42% White, 0.57% African American, 0.35% Native American, 1.05% Asian, 0.07% Pacific Islander, 0.30% from other races, and 1.24% from two or more races. Hispanic or Latino of any race were 1.31% of the population. 20.4% were of German, 13.2% Irish, 12.4% English, 10.7% Polish and 7.9% Italian ancestry according to Census 2000.
There were 4,322 households, of which 22.2% had children under the age of 18 living with them, 42.5% were married couples living together, 7.5% had a female householder with no husband present, and 47.3% were non-families. 41.5% of all households were made up of individuals and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.04 and the average family size was 2.81.
In the city, the population was spread out with 18.7% under the age of 18, 5.8% from 18 to 24, 37.5% from 25 to 44, 21.7% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 88.7 males. For every 100 females age 18 and over, there were 85.4 males.
The median income for a household in the city was $51,535, and the median income for a family was $76,369. Males had a median income of $52,188 versus $37,113 for females. The per capita income for the city was $33,222. About 1.9% of families and 3.3% of the population were below the poverty line, including 3.8% of those under age 18 and 3.6% of those age 65 or over.