According to Sperling's Best Places (accessed on 2015-12-21) and the Connecticut Economic Resources Center (using 2010 census data):

Educational Attainment

79.74% of adults over the age of 25 living in Darien have attained a bachelor's degree or higher, compared with 37.00% state-wide.

Employment

The unemployment rate in Darien is 4.50%, with job growth of 1.75%. Future job growth over the next ten years is predicted to be 39.00%.

Housing

The median home value in Darien is $1,000,001, significantly higher than the statewide median home value of $274,500.

Personal Income

Darien's income per capita is $94,301, which includes all adults and children. The median household income is $200,724, with approximately 2.0% of the town population living below the poverty line.

Taxes

Darien's sales tax rate is 6.35%. Income tax is 5.00%.