New Castle is a medium-sized city located in the state of Indiana. With a population of 17,345 people and eight associated neighborhoods, New Castle is the 51st largest community in Indiana.

The percentage of adults in New Castle with college degrees is slightly lower than the national average of 21.84% for all communities. 14.36% of adults in New Castle have a bachelor's degree or advanced degree.

The per capita income in New Castle in 2022 was $25,932, which is lower middle income relative to Indiana and the nation. This equates to an annual income of $103,728 for a family of four. However, New Castle contains both very wealthy and poor people as well.

The people who call New Castle home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of New Castle residents report their race to be White, followed by Black or African-American. Important ancestries of people in New Castle include German, English, Irish, European, and French.

The most common language spoken in New Castle is English. Other important languages spoken here include Italian and Spanish.