This map shows the ports of the Great Lakes and St. Lawrence River system. Information about a port's location and name are provided for each port.
The ports, harbors, and terminals on the Great Lakes and St. Lawrence River form the backbone that supports maritime shipping in the region. We are working with the states and provinces to gather, review, and present a complete maritime asset inventory. States and provinces can then utilize this information for port development projects and economic development plans. Private sector users can access this information to better plan their own transportation needs. This inventory will be updated annually to track investment in this crucial infrastructure over time.