The first settlers to the Westport area arrived in the period between 1810 and 1820. The land on which Westport now sits was originally granted by the Crown to a Mr. Hunter, but he never settled in the area and it was eventually purchased by Reuben Sherwood in 1817. Some of this land was later purchased by the Stoddard and Manhard families. The small community was known as Head of the Lake. In 1828, Stoddard built a saw mill and in 1829 the Manhards built a saw mill and grist mill. It became known at that time as Manhard's Mills. Two local merchants, Aaron Chambers and Lewis Cameron, named the village Westport in 1841, the name reflecting its location at the west end of Upper Rideau Lake. The post office dates from 1845. The village of Westport was incorporated in 1904 when it separated from North Crosby Township.