Dennis is a somewhat small coastal town (i.e. on the ocean, a bay, or inlet) located in the state of Massachusetts. With a population of 14,932 people and five associated neighborhoods, Dennis is the 141st largest community in Massachusetts.

Housing costs in Dennis are among some of the highest in the nation, although real estate prices here don't compare to real estate prices in the most expensive communities in Massachusetts.

Also of interest is that Dennis has more people living here who work in computers and math than 95% of the places in the US.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 12.90% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. 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.

Another notable thing is that Dennis is a major vacation destination. Much of the town’s population is seasonal: many people own second homes and only live there part-time, during the vacation season. The effect on the local economy is that many of the businesses are dependent on tourist dollars, and may operate only during the high season. As the vacation season ends, Dennis’s population drops significantly, such that year-round residents will notice that the city is a much quieter place to live.

Residents will find that the town is relatively quiet. This is because it is not over-populated, and it has fewer college students, renters, and young children - all of whom can be noisy at times. So, if you're looking for a relatively peaceful place to live, Dennis is worth considering.

Dennis 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.

Dennis is one of the most well-educated cities in the nation. 41.11% of adults in Dennis have at least a bachelor's degree. Compare that to the average community in America, which has just 21.84% with a bachelor's degree or higher.

The per capita income in Dennis in 2022 was $52,625, which is middle income relative to Massachusetts, and wealthy relative to the rest of the US. This equates to an annual income of $210,500 for a family of four. However, Dennis contains both very wealthy and poor people as well.

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

The most common language spoken in Dennis is English. Other important languages spoken here include Spanish and French Creole.