Haddam, town (1990 pop. 6,769), Middlesex co., S Conn., bisected by the Connecticut R. (here bridged), just S of Middletown; 41°28'N 72°32'W. Includes the Higganum sect. of Haddam. Agr. Industries include lumberyards; mfg. of machinery, electronic equip., wire prods., plastics, molding; extruding and offset printing. Atomic energy plant. State forest. Settled 1662, inc. 1668.
