Szilágyi Dezső tér Reformed Church, Reformed church in Víziváros, Budapest, Hungary.

Szilágyi Dezső tér Reformed Church is a red-brick Reformed church in Víziváros with a pentagonal plan and a 62-metre tower. Its neo-Gothic body is roofed with brown, yellow and green glazed Zsolnay tiles. The interior, including the furniture, was designed by Samu Pecz, and the church holds three steel bells cast in 1895.

Reformed worshippers in Buda's I and II districts first held services in the Budavár Lutheran church, but by the 1880s their number had reached 2,300. Samu Pecz won the design competition and built the church on Szilágyi Dezső Square between 1893 and 1895, with Géza Majorossy as master builder; it was consecrated on Palm Sunday 1896. Its furnishings were made to Pecz's own designs.

The church is the second-largest Reformed church in Budapest after the one on Kálvin tér. Its pastor from 1896 to 1926 was Benő Haypál, followed by his son Béla Haypál, who served until 1968. In 1915 Endre Ady married here, and in 1940 István Horthy, son of the regent, also wed in this church.

The building sits on Szilágyi Dezső Square and is accessible for worship services and visits. Visitors should wear respectful clothing and observe the guidelines that apply in religious spaces.

The church merges Protestant simplicity with Gothic architectural elements in a distinctive way that sets it apart from other religious buildings of its era. The geometric patterns in the stained glass windows demonstrate this particular balance between decoration and functional design.