East Alton is a village in Madison County, Illinois, United States. The population was 6,301 at the 2010 census.
East Alton was incorporated as a village in 1893 (some say 1894).
William Cobb, namesake of Cobb Street, was one of the first mayors, from 1895 to 1896, and again in 1902–1905.
Like many Riverbend communities, the town dates back to when European settlers came to the area in the early 19th century. And it wasn't always East Alton — the community was known as Emerald, Milton Settlement and Alton Junction. Alton Junction was also known as Wann Junction, famous locally for being the site of a horrific rail disaster.
East Alton is located at 38°53′0″N 90°6′22″W (38.883397, -90.106113).
According to the 2010 census, East Alton has a total area of 5.564 square miles (14.41 km2), of which 5.33 square miles (13.80 km2) (or 95.79%) is land and 0.234 square miles (0.61 km2) (or 4.21%) is water.
As of the census of 2000, there were 6,830 people, 2,965 households, and 1,787 families residing in the village. The population density was 1,241.3 people per square mile (479.5/km2). There were 3,171 housing units at an average density of 576.3 per square mile (222.6/km2). The racial makeup of the village was 96.72% White, 0.94% African American, 0.25% Native American, 0.38% Asian, 0.01% Pacific Islander, 0.18% from other races, and 1.52% from two or more races. Hispanic or Latino of any race were 1.02% of the population.
There were 2,965 households, out of which 30.1% had children under the age of 18 living with them, 41.3% were married couples living together, 14.3% had a female householder with no husband present, and 39.7% were non-families.