Vital records like birth, marriage, and death certificates may be accessed at Darien Town Hall. You need to be a member of a Connecticut genealogy society to access vital records at town and city records within the state. Probate and Land Records are also available in the Town Clerk's office.
Local genealogy societies include Middlesex Genealogical Society and Connecticut Ancestry Society, Inc. View the complete list of authorized societies. Membership in one of them will grant you access to many towns' archives.
Visit the Darien USGenWeb Project page. It includes listings on where to find local historical records, cemeteries, libraries, historical societies, historical information, newspapers, churches, old photos, census records, and books about Darien.
Educational programs and exhibits may be seen at the Museum of Darien.