The Reformed Church of Oradea (Biserica Reformată Oradea) is a Calvinist church in the Orașul Nou neighborhood of Oradea, Bihor County.
The construction of the church started in 1836, following the Eclectic design of the architect József Szász, but the works got delayed by the great fire of 1836. The first service was held in 1944, although the building was still under construction. Works were again delayed, first by the revolution of 1848, and then by the flood of 1851. In 1853, the construction of the church was finished without the towers, which were completed in 1870.
The church, which is the largest reformed church in Oradea, is of a hall type, with a balcony on two ends, for the organ and the choir. The entrance of the church is flanked by two side towers, of which the eastern tower has one of the largest bells in Oradea, weighing 3.600 kg.
