Allegan is a somewhat small city located in the state of Michigan. With a population of 5,162 people and five associated neighborhoods, Allegan is the 188th largest community in Michigan. Allegan has a large stock of pre-World War II architecture, making it one of the older and more historic cities in the country.

A relatively large number of people in Allegan telecommute to their jobs. Overall, about 8.60% 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.

The citizens of Allegan are slightly less educated than the national average of 21.84% for the average city or town: 15.31% of adults in Allegan have a bachelor's degree or advanced degree

The per capita income in Allegan in 2022 was $24,191, which is low income relative to Michigan and the nation. This equates to an annual income of $96,764 for a family of four. However, Allegan contains both very wealthy and poor people as well.

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

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