According to the 2010 US Census, the population of Darien was 1,975. 46.1% was male and 53.9% female. The median age was 39.3 years. There were 1,487 people 18 years old and older.
The population is 52.9 % white, 44.2% black or African American, and 1.9% hispanic or latino.
There are 798 households; 510 of which are family households; and 197 of those have children under 18.
There are 1,090 housing units in Darien. 798 are occupied and 292 are vacant. Of the vacant houses, 100 are for rent, 32 are for sale, 9 are sold but not occupied, 82 are for seasonal or recreational or occasional use, and there are 69 other vacancies.