Merrillville is a medium-sized town located in the state of Indiana. With a population of 36,524 people and nine constituent neighborhoods, Merrillville is the 26th largest community in Indiana.

The education level of Merrillville citizens is a little higher than the average for US cities and towns: 22.84% of adults in Merrillville have at least a bachelor's degree.

The per capita income in Merrillville in 2018 was $31,225, which is upper middle income relative to Indiana, and middle income relative to the rest of the US. This equates to an annual income of $124,900 for a family of four. However, Merrillville contains both very wealthy and poor people as well.

Merrillville is an extremely ethnically-diverse town. The people who call Merrillville home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Merrillville residents report their race to be Black or African-American, followed by White. Merrillville also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 15.89% of the town’s residents. Important ancestries of people in Merrillville include German, Irish, Polish, English, and Italian.

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