Cathedral of Our Lady of Mercy in Viedma, Catholic cathedral in Viedma, Argentina.

The Cathedral of Our Lady of Mercy stands on Yrigoyen Street facing Alsina Square in central Viedma. Its facade has two bell towers joined by a large arch over a portico with four columns and a pediment; the front rises 20 metres, the octagonal-topped towers another 19. Inside, four polished granite columns brought from Italy support the nave.

The first church on the site, built between 1878 and 1880, burned during Holy Week of 1884 when candles lit for the altar set it alight. A larger church rose in 1884–1886; the Diocese of Viedma was created in 1934 by Pope Pius XI, making it a cathedral. Its bell towers were finished only in 1979, for the bicentenary of Viedma's founding.

The cathedral serves as the spiritual center of Viedma's Catholic community and shapes the religious life of the city. It hosts important celebrations and gatherings that bring residents together throughout the year.

The cathedral is located in the city center and is easily accessible on foot with parking available nearby. Visitors should check opening times upon arrival since these may vary depending on services or events.

The cathedral belongs to the Ecclesiastical Province of Bahia Blanca, which connects it to a broader network of churches across the wider region. This affiliation shapes how the institution operates and coordinates its activities.