Sycamore is a medium-sized city located in the state of Illinois. With a population of 18,682 people and five associated neighborhoods, Sycamore is the 136th largest community in Illinois. Much of the housing stock in Sycamore was built relatively recently. The construction of new real estate can often be taken as an indication that the local Sycamore economy is robust, and that jobs or other amenities are attracting an influx of new residents. This seems to be the case in Sycamore, where the median household income is $80,837.00.

Telecommuters are a relatively large percentage of the workforce: 12.69% 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 education level of Sycamore ranks among the highest in the nation. Of the 25-and-older adult population in Sycamore, 43.59% 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 Sycamore in 2022 was $40,963, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $163,852 for a family of four. However, Sycamore contains both very wealthy and poor people as well.

Sycamore is a somewhat ethnically-diverse city. The people who call Sycamore home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Sycamore residents report their race to be White, followed by Black or African-American. Important ancestries of people in Sycamore include German, Irish, English, Italian, and Polish.

The most common language spoken in Sycamore is English. Other important languages spoken here include Spanish and German/Yiddish.