St. John is a medium-sized town located in the state of Indiana. With a population of 22,847 people and four associated neighborhoods, St. John is the 48th largest community in Indiana. There's nothing like the smell of a brand new house, and in St. John, you'll find that a large proportion of houses were recently built. New growth in residential real estate is an indication that people are choosing to move to St. John, and putting down their money on brand new construction. St. John’s real estate is, on average, some of the newest in the nation. St. John does seem to be experiencing an influx of affluent people, because the median household income is $123,799.00.

St. John real estate is some of the most expensive in Indiana, although St. John house values don't compare to the most expensive real estate in the U.S.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 9.43% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

St. John is a good choice for families with children because of several factors. Many other families with children live here, making it a place where both parents and children are more likely to develop social ties with other families. The town’s good public school district and large population of college-educated adults provide an environment conducive to academic success. Many people own their own single-family homes, providing areas for children to play and stability in the community. Finally, St. John’s overall crime rate ranks among the lowest in the country, making it one of the safest places to raise a family.

In St. John, however, the average commute to work is quite long. On average, people spend 31.69 minutes each day getting to work, which is significantly higher than the national average.

The population of St. John is very well educated relative to most cities and towns in the nation, where the average community has 21.84% of its adult population holding a 4-year degree or higher: 39.98% of adults in St. John have a bachelor's degree or even advanced degree.

The per capita income in St. John in 2022 was $51,833, which is wealthy relative to Indiana and the nation. This equates to an annual income of $207,332 for a family of four.

St. John is a very ethnically-diverse town. The people who call St. John home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of St. John residents report their race to be White, followed by Black or African-American. St. John also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 12.44% of the town’s residents. Important ancestries of people in St. John include German, Polish, Irish, Italian, and English.

The most common language spoken in St. John is English. Other important languages spoken here include Spanish and Serbo-Croatian.