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Keyport Historical Society Keyport Historical Society Welcome sEE OUR EVENTS PAGE FOR MORE INFORMATION on upcoming events. Keyport Origins Started as an 800 acre plantation settled by the Kearney family in 1714. It was called Key Grove Farms and farming timber shipping and oystering were the main sources of income. In 1829 the Kearney Estate was partitioned and sold at auction and the sale was the foundation of the soon to be town of Keyport.