“ACCORDING TO SEVERAL SOURCES, including a booklet, A Sketch of Monmouth County, published in 1929 by the Board of Chosen Freeholders, Monmouth County was named after the County of Monmouthshire, in South Wales, Great Britain.
According to the “Sketch,” Monmouth County was officially formed on March 7, 1683, by the General Assembly as one of the four original counties of the Province of East Jersey. “It was named, through the influence of Colonel Lewis Morris, after Monmouthshire, where his family had a vast estate.”