This list of churches in Aust-Agder is a list of the Church of Norway churches in Aust-Agder county, Norway. The churches are all part of the Diocese of Agder og Telemark along with the churches in Vest-Agder and Telemark county. The diocese is based at the Kristiansand Cathedral in the city of Kristiansand.
This list is divided into four sections, one for each Deanery (prosti) in the county. Administratively within each deanery, the churches are divided by municipalities which have their own church council (fellesråd). Each municipal church council may be made up of more than one parish (sokn), each of which may have their own council (soknerådet). Each parish may have one or more congregations in it.
This deanery covers a small, coastal, urban area covering the municipalities of Arendal and Froland in Aust-Agder county. The deanery is headquartered at Trinity Church in the town of Arendal in Arendal municipality. The deanery was established on 1 January 1872 when it was split off from the Vest-Nedenes deanery. It initially included all the parishes of Trefoldighet, Barbu, Austre Moland, Tromøy, Hisøy, Øyestad, Froland, and Herefoss. The parishes of Austre Moland, Flosta, and Stokken were merged to form the parish of Moland effective 1 January 2018.
This deanery covers the northeastern part of Aust-Agder county including the municipalities of Gjerstad, Tvedestrand, Risør, Åmli, and Vegårshei. The deanery is headquartered at Tvedestrand Church in the town of Tvedestrand in Tvedestrand municipality. The deanery was established on 1 March 1826 when it was split off from the old Nedenes deanery. The deanery was named Østre Nedenæs until 19 May 1922 when it was renamed Aust-Nedenes.