The ruins of Aghavallen Protestant church, Church of Ireland are just NW of Ballylongford, Aghavallen (W of Tarbert)The two old burial grounds of the parish are located at Aghavallen, around the ruins of the old parish church, and at Lislaughtin at the site of the old abbey.

The parish is situated on the river Shannon, and within a mile and a half of the high road from Tralee to Limerick.
According to the Topographical Dictionary of Ireland by Samuel Lewis (1837), it was formerly known as Aghavallin, or Aghavalah, a parish in the barony of Iraghticonnor, and province of Munster, 4½ miles (W. S. W.) from Tarbert; containing with the town of Ballylongford and the island of Carrigue.Anciently, it belonged to the O'Connors of Kerry, whose principal seat, Castle Carrig-a-foile, (signifying in the Irish language the rock of the chasm), was situated on the south-west side of the inlet between the mainland and the small island of Carrigue, which is encircled by the river Shannon.
In the Church of Ireland, the parish of Aghavallen has been united with other parishes since the seventeenth century. The old church continued in use into the nineteenth century, and was rebuilt in 1840, but is now in ruins. In 1878 the parish was merged with Listowel. The nearest Church of Ireland church is now in Tarbert (Kilnaughtin Church), administered from Rathkeale in County Limerick.
In the Roman Catholic chuch, Aghavallen was united to Kilnaughten from at least the beginning of the eighteenth century. In 1859, the parishes were again seperated, but under the modern names of Ballylongford and Tarbert. The Roman Catholic parish of Ballylongford is identical with the old parish of Aghavallen. A second church in the parish has been built at Asdee. The Church of Ireland Parish registers for Aghavallen record baptisms from 1872 and marriages from 1811.
From 1863 Aghavallen was part of the Listowel Registration District.
The Civil Parish of Aghavallen ceased to be used for census purposes in the mid nineteenth century when District Electoral Divisions (DEDs) were introduced.