Lagonegro Cathedral (Italian: Duomo di Lagonegro; Concattedrale di San Nicola di Bari) is a Roman Catholic cathedral dedicated to Saint Nicholas located in the comune of Lagonegro in Basilicata, southern Italy.
Since 1976 it has been a co-cathedral of the Roman Catholic Diocese of Tursi-Lagonegro.
The church was built in the 9th and 10th centuries, but has been renovated many times since.
The interior is very spacious and heterogenous, owing to several expansions.
Treasures include a crucifix by Altobello Persio, a depiction of Mary and the saints by Giovanni Bernardino Azzolini and the main altar, which dates from the 18th century.