The church in honor of St. Nicholas the Wonderworker, known as Pyhän Nikolauksen kirkko in Finnish and S:t Nikolaus kyrka in Swedish, is an Orthodox church in Helsinki. It is part of the Patriarchal Parishes in Finland and is under the jurisdiction of the Russian Orthodox Church.

The Russian Nicholas parish was founded in Helsinki in 1927 and received official registration from the State Council of Finland as a private religious organization, being part of the Vyborg private Orthodox community.

From 1929 to 1938, the community held services in a house church located in rented premises. In 1938, under the guidance of architect Ivan Kudryavtsev, the construction of a stone church in the Hietaniemi area was completed. The church was consecrated on November 28 (December 10) 1938 in honor of St. Nicholas the Wonderworker. Later, according to the design of the same architect, an altar part was added to the church, and the church was re-consecrated on December 4 (17) 1950.

As of 2014, the parish had 2,780 registered members, of which 70% were citizens of Finland.