Washington is a medium-sized city located in the state of Illinois. With a population of 15,890 people and five associated neighborhoods, Washington is the 157th largest community in Illinois. Much of the housing stock in Washington was built relatively recently. The construction of new real estate can often be taken as an indication that the local Washington economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in Washington, where the median household income is $87,104.00.

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

Telecommuters are a relatively large percentage of the workforce: 10.87% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. 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.

Washington 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 city’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, Washington’s overall crime rate is lower than average for the country.

Washington is a small city, and as such doesn't have a public transit system that people use to get to and from their jobs every day.

The citizens of Washington are among the most well-educated in the nation: 43.46% of adults in Washington 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 Washington in 2022 was $40,156, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $160,624 for a family of four. However, Washington contains both very wealthy and poor people as well.

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

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