Wexford's walls are different. Considerable stretches of the Anglo-Norman defences survive above ground, threading through the modern town in fragments that range from a curved corner off Bride Street to a 190-metre run at the north-western edge. What makes them stranger still is what lies beneath: the Anglo-Norman builders most likely followed the course of an earlier Viking earthwork, a set of defensive ramparts whose existence is inferred from the general layout but which has never been confirmed by excavation.

The walls as they now stand are a product of Anglo-Norman construction, enclosing a circuit that began at the harbour, swung inland across what are now Barrack Street, King Street, and Bride Street, then tracked northward through the upper town before turning back toward the water at the West Gate. Within St Patrick's graveyard, a 3-metre-wide earthen rampart folded into the wall dates not from the medieval period at all but from the Cromwellian siege of 1649. Excavations at various points around the circuit, most of them incidental to development work or pipe-laying, have turned up wall bases with clay-bonded cores and mortared facing stones, sections buried well below the modern street level, and, in one case in 2019, an outer face about 4 metres high revealed when ground outside Mary Street was cleared for a car park. A tower between Rowe Street and John's Gate Street was removed in the late nineteenth century and has not been relocated despite subsequent monitoring work nearby.

The West Gate, at the north-western corner, is the only original gateway still standing. It functions as a four-storey tower house, with a vaulted passage at ground level, a mural stair climbing to the upper floors, fireplaces, a garderobe, and lookout platforms at the west and south angles of the ruined parapet. From the second floor there is access onto the wall-walk of the town wall running northward. Restored by Wexford County Council, it operates as a visitor centre and provides the clearest sense of the wall's original scale. The longest continuous stretch of upstanding wall, running roughly 190 metres from George's Street to and beyond the gate, includes a projecting circular tower entered from the wall-walk and traces of an external fosse, a defensive ditch, about 10 metres wide toward the northern end.