County Wexford is a maritime county in the south-east of Ireland, in the province of Leinster. It is known as "Ireland's sunny south-east" for its high amount of sunshine. Largely low-lying fertile land is the characteristic landscape of the county. The highest point in the county is Mt Leinster (795 m, 2610 ft) in the Blackstairs Mountains around the north-west boundary.

Southeastern Wexford is an important site for wild birds - the north side of Wexford Harbour, the North Slob, is home to 10,000 Greenland White-Fronted Geese each winter (roughly one third of the entire world's population), while in the Summer Lady's Island Lake is an important breeding site for terns, especially the Roseate Tern.

Wexford was the site of an invasion by Normans in 1169 at the behest of Diarmuid MacMurrough Kavanagh, King of Leinster, which led to the subsequent colonisation of the country by the English.

Wexford, particularly the baronies of Bargy and Forth, saw one of the most heavy concentrations of medieval English settlements in Ireland. An old dialect of English, known as Yola, was spoken uniquely in Wexford up until the 19th century. The north of the county remained Gaelic Irish in character, predominantly under the control of the MacMurrough Kavanagh clan.

County Wexford produced strong support for Confederate Ireland during the 1640s. A fleet of Confederate privateers was based in Wexford town. As a result, the town was sacked by the English Parliamentarians during the Cromwellian conquest of Ireland.

County Wexford was one of the main areas in which the 1798 rebellion was fought. There were significant battles at Enniscorthy and New Ross, the famous ballad Boolavogue was written in remembrance of the Wexford rising.

Much of the county's remarkable history of early Celtic, Viking, and Norman remains have been preserved and transformed into premier tourist attractions. The Irish National Heritage Park presents life as it was including a Viking boatyard, replicas of homesteads and a 7th century watermill.