Mary Rae, a native of England was born June 15, 1816. She came to America is 1833 and resided in what was to become known as “English Prairie”. In 1837 she was married to Jonathan Ineson, also an early settler on the prairie. Their son Robert was the first born son in the County. There were eight children in all, including the first set of twins born on the prairie. The girls were baptized Mary and Elizabeth. Both lakes were named after these girls, Lake Mary & Lake Elizabeth, which extended into Illinois, and almost to the English Prairie. A post office called Twin Lakes has been in operation since 1891.
As of the census of 2010, there were 5,989 people, 2,345 households, and 1,618 families living in the village. The population density was. There were 3,251 housing units at an average density of. The racial makeup of the village was 96.2% White, 0.6% African American, 0.2% Native American, 0.4% Asian, 0.1% Pacific Islander, 1.4% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 4.7% of the population. There were 2,345 households of which 33.0% had children under the age of 18 living with them, 52.2% were married couplesliving together, 10.8% had a female householder with no husband present, 6.1% had a male householder with no wife present, and 31.0% were non-families. 24.4% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.04. The median age in the village was 38.9 years. 24.7% of residents were under the age of 18; 7.8% were between the ages of 18 and 24; 27.1% were from 25 to 44; 29.2% were from 45 to 64; and 11.4% were 65 years of age or older. The gender makeup of the village was 50.3% male and 49.7% female.
2000 census
As of the census of 2000, there were 5,124 people, 1,973 households, and 1,390 families living in the village. The population density was 948.5 people per square mile. There were 2,742 housing units at an average density of 507.6 per square mile. The racial makeup of the village was 97.35% White, 0.37% African American, 0.18% Native American, 0.57% Asian, 0.02% Pacific Islander, 0.57% from other races, and 0.96% from two or more races. Hispanic or Latino of any race were 2.48% of the population. There were 1,973 households out of which 35.1% had children under the age of 18 living with them, 58.0% were married couples living together, 8.3% had a female householder with no husband present, and 29.5% were non-families. 22.8% of all households were made up of individuals and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.05. In the village, the population was spread out with 27.1% under the age of 18, 7.3% from 18 to 24, 30.3% from 25 to 44, 23.1% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 98.8 males. For every 100 females age 18 and over, there were 97.8 males. The median income for a household in the village was $46,601, and the median income for a family was $54,583. Males had a median income of $42,589 versus $27,395 for females. The per capita income for the village was $22,226. About 4.5% of families and 6.6% of the population were below the poverty line, including 7.8% of those under age 18 and 9.2% of those age 65 or over.
