a parliamentary borough and seaport of Ireland, county Louth, on the S. bank of the Castletown river, near its mouth in Dundalk Bay, 50 miles N. of Dublin. Pop. (1851) 9995. It possesses some good streets, but a great part of the town is filthy and wretched. The parish church is an old and spacious edifice. The other public buildings are—a Roman Catholic chapel, Presbyterian and Methodist meeting-houses, county court-house, infirmary, prison, guildhall, market-house, linen-hall, endowed grammar-school, national schools, and barracks. It has also two breweries, two flour mills, a large distillery, a flax spinning mill, and a pin factory. It carries on a brisk trade, chiefly in agricultural and dairy produce. The municipal government is vested in a bailiff, a recorder, and 16 burgesses. Dundalk returns one member to parliament. The port and harbour of Dundalk have recently been undergoing extensive improvements. The course of the river has been straightened, and the bar and harbour deepened from 5 to 8 feet, so that vessels drawing 16 feet water can now come up to the town. The channel, when completed, will be 150 feet wide at the quays, and 300 at the point. A lighthouse, on the screw-pile principle, has been erected at the bar. Steamers ply regularly to Liverpool three times a-week. On 31st December 1832 the registered shipping belonging to the port was 23 vessels of 1871 tons, and 2 steamers of 844 tons. The number and tonnage of vessels that entered and cleared at the port during 1852 were:—inwards, sailing vessels 519, tonnage 35,928; steamers 109, tonnage 77,782; outwards, sailing vessels 224, tonnage 17,074; steamers 105, tonnage 46,235. Market-day Monday. Three newspapers are published in Dundalk. In the reign of Edward II. Dundalk was a royal city—the last that we read of where a monarch of all Ireland was actually crowned and resided.