South Lyon is a city in Southwestern Oakland County in the U.S. state of Michigan, in Metro Detroit. The population was 11,327 at the 2010 census. The city is part of the South Lyon-Howell-Brighton Urban Area, which had a population of 106,139 according to the 2000 census. South Lyon is located in Oakland County’s Lyon Township, near the Livingston County and Washtenaw County lines. The city is 19 miles (31 km) north of Ann Arbor, 45 miles (72 km) west of Detroit and 58 miles (93 km) east of Lansing.
According to the United States Census Bureau, the city has a total area of 3.73 square miles (9.66 km), all land.
As of the census of 2010, there were 11,327 people, 4,646 households, and 2,914 families residing in the city. The population density was 3,036.7 inhabitants per square mile (1,172.5/km). There were 5,125 housing units at an average density of 1,374.0 per square mile (530.5/km). The racial makeup of the city was 95.2% White, 0.8% African American, 0.3% Native American, 1.7% Asian, 0.5% from other races, and 1.6% from two or more races. Hispanic or Latino people of any race were 2.7% of the population.
There were 4,646 households of which 34.7% had children under the age of 18 living with them, 50.0% were married couples living together, 9.2% had a female householder with no husband present, 3.5% had a male householder with no wife present, and 37.3% were non-families. 32.3% of all households were made up of individuals and 13.4% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 3.13.
The median age in the city was 38.4 years. 26.9% of residents were under the age of 18; 6.2% were between the ages of 18 and 24; 28.3% were from 25 to 44; 24.4% were from 45 to 64; and 14.1% were 65 years of age or older. The gender makeup of the city was 46.7% male and 53.3% female.
As of the census of 2000, there were 10,036 people, 4,246 households, and 2,704 families residing in the city. The population density was 2,958.2 per square mile (1,143.0/km²). There were 4,461 housing units at an average density of 1,314.9 per square mile (508.1/km²). The racial makeup of the city was 96.68% White, 0.39% African American, 0.17% Native American, 1.09% Asian, 0.12% Pacific Islander, 0.40% from other races, and 1.16% from two or more races. Hispanic or Latino people of any race were 1.60% of the population.
There were 4,246 households out of which 31.7% had children under the age of 18 living with them, 53.2% were married couples living together, 7.6% had a female householder with no husband present, and 36.3% were non-families. 30.7% of all households were made up of individuals and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.98.
In the city, the population was spread out with 24.8% under the age of 18, 7.0% from 18 to 24, 36.0% from 25 to 44, 17.1% from 45 to 64, and 15.0% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 91.2 males. For every 100 females age 18 and over, there were 87.5 males.
The median income for a household in the city was $53,395, and the median income for a family was $67,167. Males had a median income of $53,818 versus $32,083 for females. The per capita income for the city was $26,187. About 2.8% of families and 5.2% of the population were below the poverty line, including 5.5% of those under age 18 and 7.1% of those age 65 or over.