Highland is a city in Madison County, Illinois, United States. The population was 9,919 at the 2010 census. Highland began as a Swiss settlement and derived its name from later German immigrants.
According to the 2010 census, Highland has a total area of 7.591 square miles (19.66 km), of which 6.55 square miles (16.96 km) (or 86.29%) is land and 1.041 square miles (2.70 km) (or 13.71%) is water.
As of the census of 2010, there were 9,919 people, 4,013 households, and 2,633 families residing in the city. The population density was 1,561.1 people per square mile (602.2/km²). There were 3,610 housing units at an average density of 667.9 per square mile (257.6/km²). The racial makeup of the city was 97.00% White, 0.2% African American, 0.2% Native American, 0.9% Asian, 0.4% from other races, and 1.3% from two or more races. Hispanic or Latino of any race were 1.4% of the population.
There were 4,013 households and 2,633 families. 50.3% of the families have children 18 years old or younger. There are 2,017 husband-wife families. 29.5% of all the households were made up of one individual and 16.4% 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 2.99.
In the city, the population was spread out with 24.8% under the age of 18, 8.6% from 18 to 24, 27.5% from 25 to 44, 23% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 36.8 years. Of the total population 4,714 are males and 5,205 are females.
The median income for a household in the city was $39,524, and the median income for a family was $52,240. Males had a median income of $36,536 versus $25,620 for females. The per capita income for the city was $21,101. About 3.6% of families and 6.8% of the population were below the poverty line, including 6.9% of those under age 18 and 8.3% of those age 65 or over.
Highland Illinois neighborhoods include: Grantfork, Highland South, Lindenthal Ave, Northwoods, Silver Lake Rd, Southtown, Swiss Valley Estates, Trails