South Dennis is located in Massachusetts. South Dennis, Massachusetts has a population of 7,044. South Dennis is less family-centric than the surrounding county with 14% households with children. The county percentage for households with children is 17%.
The median household income in South Dennis, Massachusetts is $63,606. 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 South Dennis is 56.5 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.