South Dennis is a city located in Massachusetts. South Dennis has a 2020 population of 3,684. South Dennis is currently declining at a rate of 0.00% annually and its population has increased by 1.13% since the most recent census, which recorded a population of 3,643 in 2010. South Dennis reached it's highest population of 3,684 in 2018.
The average household income in South Dennis is $68,844 with a poverty rate of 12.49%. The median rental costs in recent years comes to $1,226 per month, and the median house value is $288,800. The median age in South Dennis is 52.6 years, 50.7 years for males, and 54.8 years for females. For every 100 females there are 82.6 males.