Vandalia is a somewhat small city located in the state of Illinois. With a population of 7,400 people and three associated neighborhoods, Vandalia is the 270th largest community in Illinois.

Also of interest is that Vandalia has more people living here who work in computers and math than 95% of the places in the US.

Being a small city, Vandalia does not have a public transit system used by locals to get to and from work.

The rate of college-level education in Vandalia is quite a bit lower than the national average among all cities of 21.84%: just 10.94% of people here over 25 have a bachelor's degree or an advanced degree.

The per capita income in Vandalia in 2022 was $22,462, which is low income relative to Illinois and the nation. This equates to an annual income of $89,848 for a family of four. However, Vandalia contains both very wealthy and poor people as well.

Vandalia is a very ethnically-diverse city. The people who call Vandalia home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Vandalia residents report their race to be White, followed by Black or African-American. Important ancestries of people in Vandalia include German, English, Irish, Swedish, and Italian.

The most common language spoken in Vandalia is English. Other important languages spoken here include Spanish and Polish.