Rochester is a very small village located in the state of Illinois. With a population of 3,856 people and two associated neighborhoods, Rochester is the 407th largest community in Illinois. Much of the housing stock in Rochester was built relatively recently. The construction of new real estate can often be taken as an indication that the local Rochester economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in Rochester, where the median household income is $107,800.00.

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

A relatively large number of people in Rochester telecommute to their jobs. Overall, about 11.58% 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.

Rochester 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 village’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, Rochester’s overall crime rate is lower than average for the country.

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

The education level of Rochester ranks among the highest in the nation. Of the 25-and-older adult population in Rochester, 49.82% have at least a bachelor's degree. The typical US community has just 21.84% of its adults holding a bachelor's degree or graduate degree.

The per capita income in Rochester in 2022 was $45,025, which is wealthy relative to Illinois and the nation. This equates to an annual income of $180,100 for a family of four.

The people who call Rochester home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Rochester residents report their race to be White, followed by Asian. Important ancestries of people in Rochester include German, English, Irish, Italian, and Polish.

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