Wallingford, town (1990 pop. 40,822), New Haven co., S Conn.; inc. 1670. Its silverware industry dates from c.1835. Fruit growing and the manufacture of plastics, steel, precision instruments, and hardware are among the town's other industries. In Wallingford is the Choate preparatory school for boys, now coordinated with Rosemary Hall, a girls' preparatory school formerly located at Greenwich, Conn. A branch of the Oneida Community was founded in the town in 1851. Lyman Hall was born there.