Kildare is in eastern Ireland where most of the area is flat farmland. The principal crops are wheat, barley, oats, and root vegetables.

It is famous for racehorse breeding, and cattle raising is also important. Manufactures include textiles, paper products, and cutlery.

Naas, County Kildare, was the home of the kings of Leinster from the 2nd to the 12th century.

The Boyne River rises in the Bog of Allen and flows northeast past the towns of Trim, An Uaimh, and Slane in county Meath and Drogheda in county Louth. It empties into the Irish Sea near Drogheda. The river is 113 km (70 mi) long and is navigable by shallow-draft vessels only as far as Drogheda. The decisive Battle of the Boyne took place on the banks of the river in 1690 during the so-called Glorious Revolution.