St. John is a medium-sized town located in the state of Indiana. With a population of 23,644 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 $127,449.00.

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.

A relatively large number of people in St. John telecommute to their jobs. Overall, about 11.45% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. 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.

Because of many things, St. John is a great place for families with children to consider. First of all, many other families with children live here, making St. John a place where both parents and children are more likely to develop social ties with other families, as well as find family-oriented services and community. The town’s good public school district and large population of college-educated adults provide an environment conducive to academic values. With regard to real estate, St. John has a high rate of owner-occupied single family homes, which tends to reflect stability in the local 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.

One downside of living in St. John is that it can take a long time to commute to work. In St. John, the average commute to work is 32.01 minutes, which is quite a bit higher than the national average.

The citizens of St. John are among the most well-educated in the nation: 42.87% of adults in St. John have a bachelor's degree or even advanced degree, whereas the average US city has 21.84% holding at least a bachelor's degree.

The per capita income in St. John in 2022 was $53,724, which is wealthy relative to Indiana and the nation. This equates to an annual income of $214,896 for a family of four.

St. John is a somewhat 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 10.62% 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 Vietnamese.