The Finnish Transport Agency is responsible for most of Finland’s waterways and canals. The maintenance and development of waterways and canals take account of the navigation needs of merchant shipping and other waterborne traffic.

Approximately 8,300 kilometres of coastal fairways and 8,000 kilometres of inland waterways are maintained by the Finnish Transport Agency. The total length of waterways maintained by the Agency, 16,300 kilometres, includes nearly 4,000 kilometres of fairways used for merchant shipping.

In total, Finland has approximately 20,000 kilometres of public, mapped fairways recorded on maps. These fairways are marked with more than 34,000 maritime aids to navigation (including lighthouses, buoys signs and leading beacons). The Finnish Transport Agency is responsible for maintaining roughly two-thirds of these, which totals 25,700 maritime aids to navigation. In addition to the Saimaa Canal, which connects the Saimaa Lake District to the sea, the waterway network has 31 other lock canals.