East Carondelet is a village in St. Clair County, Illinois, United States. The population was 499 as of the 2010 census.
According to the 2010 census, East Carondelet has a total area of 1.673 square miles (4.33 km2), of which 1.21 square miles (3.13 km2) (or 72.33%) is land and 0.463 square miles (1.20 km2) (or 27.67%) is water.
As of the census of 2000, there were 267 people, 94 households, and 68 families residing in the village. The population density was 213.5 people per square mile (82.5/km2). There were 105 housing units at an average density of 84.0 per square mile (32.4/km2). The racial makeup of the village was 92.51% White, 3.37% African American, 1.87% Native American, 0.37% from other races, and 1.87% from two or more races.
There were 94 households, out of which 37.2% had children under the age of 18 living with them, 54.3% were married couples living together, 16.0% had a female householder with no husband present, and 26.6% were non-families. 22.3% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.84 and the average family size was 3.28.
In the village, the population was spread out, with 29.6% under the age of 18, 6.4% from 18 to 24, 26.6% from 25 to 44, 25.5% from 45 to 64, and 12.0% who were 65 years of age or older.