On the south side of the locks there is the old blockhouse, which has been restored by Parks Canada as a tourist site and museum operated by the Merrickville and District Historical Society.

A plaque was erected by the Merrickville and District Historical Society in remembrance of an unknown number of persons who were buried in the McGuigan Cemetery between the years 1800 and 1900; Many died of pestilence, principally malaria, during the construction of the Rideau Canal.

After the canal was completed, the excess water once again turned the wheels of the mills and the improved transportation system caused a surge in commercial activity in the village.

The end of the community's industrial growth is closely related to the decline of the commercial phase of the Rideau canal.

The rise of the nearby town of Smiths Falls as a major railway hub displaced Merrick's Mills as an industrial leader in the region.

[2] Population trend:[6] Mother tongue:[7] Merrickville was acknowledged as Canada's Most Beautiful Village by Communities in Bloom in 1998, as its charming streets are lined with heritage architecture, artists' studios, specialty boutiques and restaurants.

Every summer there is the Merrickville Fair which brings a midway, 4-H Livestock Show events, agricultural displays and other attractions to the town.

In July there is also a Vintage Car Show that brings exhibitors from central and eastern Canada and the United States.

The resulting 6,000-square-foot (557 m²) ballroom provides an unobstructed venue frequently utilized for celebrations and social gatherings.