One thing noticeable about Manchester, although not a huge town, is that it has a large population of people who are young, single, educated, and upwardly-mobile career starters. That’s because Manchester is full of single people in their 20s and 30s and who have undergraduate or graduate degrees and are starting careers in professional occupations. This makes Manchester a pretty good place for young, educated career starters looking to find many people like themselves, with good opportunities for friendships, socializing, romance, and fun.

The citizens of Manchester are very well educated compared to the average community in the nation: 38.59% of adults in Manchester have a bachelor's degree or even advanced degree.

The per capita income in Manchester in 2018 was $37,708, which is lower middle income relative to Connecticut, and upper middle income relative to the rest of the US. This equates to an annual income of $150,832 for a family of four. However, Manchester contains both very wealthy and poor people as well.

Manchester is an extremely ethnically-diverse town. The people who call Manchester home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Manchester residents report their race to be White, followed by Black or African-American. Manchester also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 14.68% of the town’s residents. Important ancestries of people in Manchester include Irish, Italian, English, German, and Polish.

Foreign born people are also an important part of Manchester's cultural character, accounting for 15.41% of the town’s population.

The most common language spoken in Manchester is English. Other important languages spoken here include Spanish and Langs. of India.