This is an alphabetical list of the main rivers on the island of Ireland. It includes rivers that flow through the Republic of Ireland and Northern Ireland. Rivers that flow through Northern Ireland are marked with an asterisk (*). There are over 70,000 km of waterways in the Republic of Ireland contained in 3,192 river water bodies including rivers, streams, and tributaries. The major rivers have their length (in miles and kilometres) given. Also shown are two tables. Table 1 shows the longest rivers in Ireland with their lengths (in miles and kilometres), the counties they flow through, and their catchment areas (in km2). Table 2 shows the largest rivers in Ireland (by mean flow) in cubic meters per second.
