No. A volcano is not a plate boundary. Most volcanoes on land are associated with convergent boundaries, but many are associated with divergent boundaries and others with hot spots.
On a convergent boundary.
The Falcon Volcano on the Tonga Islands are in the Indo-Australian Plate- a convergent boundary.
convergent
convergent plate boundary
They can be associated with both, but are most often found near convergent boundaries.
convergent
Composite cone
Paricutin is located on a convergent boundary. The volcano formed as a result of the subduction of the Cocos Plate beneath the North American Plate in Mexico.
rezy
The Falcon Volcano on the Tonga Islands are in the Indo-Australian Plate- a convergent boundary.
The Turrialba Volcano is located on a convergent plate boundary where the Cocos Plate is subducting beneath the Caribbean Plate. This subduction process is responsible for the volcanic activity in the region.
oceanic crest and volcano.