The 2016 Chatham, Massachusetts, population is 6,143. There are 381 people per square mile (population density).
The median age is 57.4. The US median is 37.4. 59.06% of people in Chatham, Massachusetts, are married. 11.84% are divorced.
The average household size is 2.1 people. 19.29% of people are married, with children. 7.76% have children, but are single.
90.93% of people are white, 5.16% are black, 0.67% are asian, 0.00% are native american, and 0.28% claim 'Other'.
2.15% of the people in Chatham, Massachusetts, claim hispanic ethnicity (meaning 97.85% are non-hispanic).
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