Dennis is located in Massachusetts. Dennis, Massachusetts has a population of 15,012. Dennis is less family-centric than the surrounding county with 13% households with children. The county percentage for households with children is 17%.
The median household income in Dennis, Massachusetts is $68,198. The median household income for the surrounding county is $78,548 compared to the national median of $66,222. The median age of people living in Dennis is 57.2 years.
The average high temperature in July is 77.8 degrees, with an average low temperature in January of 21.2 degrees. The annual precipitation is 43.03.