Middletown is a medium-sized coastal town (i.e. on the ocean, a bay, or inlet) located in the state of Delaware. With a population of 24,698 people and seven associated neighborhoods, Middletown is the fourth largest community in Delaware. Middletown has seen a significant amount of newer housing growth in recent years. Quite often, new home construction is the result of new residents moving in who are middle class or wealthier, attracted by jobs, a healthy local economy, or other amenities as they leave nearby or far away areas for greener pastures. This seems to be the case in Middletown, where the median household income is $104,662.00.

Also of interest is that Middletown 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 Middletown telecommute to their jobs. Overall, about 11.74% 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.

Middletown is also nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Quite often, nautical areas such as these attract visitors and locals who come to enjoy the scenery and various waterfront activities.

The citizens of Middletown are among the most well-educated in the nation: 41.86% of adults in Middletown 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 Middletown in 2018 was $48,426, which is wealthy relative to Delaware and the nation. This equates to an annual income of $193,704 for a family of four. However, Middletown contains both very wealthy and poor people as well.

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

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