Washington is a somewhat small city located in the state of Missouri. With a population of 15,075 people and five associated neighborhoods, Washington is the 54th largest community in Missouri.

Telecommuters are a relatively large percentage of the workforce: 12.13% 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.

The overall education level of Washington is somewhat higher than in the average US city of 21.84%: 27.71% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in Washington in 2018 was $37,635, which is wealthy relative to Missouri, and upper middle income relative to the rest of the US. This equates to an annual income of $150,540 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 Black or African-American. Important ancestries of people in Washington include German, Irish, English, French, and Polish.

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