Lynnfield initially consisted of two separate villages with a single governing body. Lynnfield Center comprises mostly an agricultural population, while South Lynnfield boasted a mixed culture. Together, the two towns evolved into one of the most prosperous suburbs in the North Shore region of Massachusetts.
The town of Lynnfield was first settled in 1638 and was made a district in 1782. It was later officially incorporated in 1842. Historically, Lynnfield functioned as two separate villages connected by one governing body: in Lynnfield Center resided a mostly agricultural population, while South Lynnfield was a crossroad situated amongst neighboring larger towns. During this time, the town had two inns, a granite rock quarry, a small carbonated beverage bottler, and various eating institutions.
The stagecoach line north from Boston to Portsmouth, New Hampshire, known locally as the "Newburyport Turnpike", ran through South Lynnfield. Later this roadway became U.S. Route 1, the route which brought many people north to the small town during the post-World War Two population surge. Lynnfield had attractions such as horse shows and ballroom dancing. Lynnfield has since become a modern, chiefly residential suburb of Boston.
Along with the communities of Chelsea, Lynn, Salem, Marblehead, Danvers, Middleton, Andover, Methuen, Haverhill, Amesbury and Salisbury, Lynnfield was a part of "The Gerry-mander" so described by the Boston Gazette on March 26, 1812.
Lynnfield Center retained limited commuter rail service, via the Boston & Maine Railroad, into the late 1950s/early 1960s with a small railroad boarding platform located not far from the current Town Hall offices.
When, in the 1960s, the United States Post Office implemented the Zone Improvement Program with 5-digit numerical codes, Lynnfield was assigned two ZIP codes, 01940 and 01944, for the Lynnfield Center and the South Lynnfield post offices, respectively. Later, 01944 was re-assigned to Manchester (now Manchester-by-the-Sea); South Lynnfield currently shares Zip Code 01940 with Lynnfield Center.