Saint Ignatius of Loyola Church, Esztergom-Víziváros, Baroque parish church in Víziváros, Hungary.

Saint Ignatius of Loyola Church in Víziváros is a single-nave Baroque church of about 400 m², built 1728–1738 to plans by Petrus Ross. Its two symmetrical towers were added in the 19th century after a ban on towers near the castle was lifted, and the classicising facade dates from 1840. A statue of Saint Ignatius stands at the gable top.

The present Baroque church was built by the Jesuits between 1728 and 1738 to plans by the Italian-born architect Petrus Ross, next to the former water gate, together with a Jesuit residence. It was consecrated by Michael Karl von Althann, bishop of Vác. The order was dissolved in 1773, and in 1788 Joseph II assigned the church to Archbishop József Batthyány as the parish church of Víziváros.

The church is named after the founder of the Jesuit order, reflecting the order's influence in the region during the 18th century. Visitors today can see religious artworks that show how important this saint was to the local community.

The church is located at Mindszenty Square and is easy to find in this part of the city. Visitors should know that regular Catholic services take place and respectful clothing is expected.

From 1820 to 1856, this church served as the archbishop's cathedral while the Basilica of Esztergom was being built. This was an unusual role for a parish church, which normally serves a local congregation.