Saint Nicholas the Wonderworker (Russian: Tserkov the saint Nicholas the Wonderworker), known as the Russian Church, is an Orthodox church in the Bulgarian capital Sofia dedicated to St. Nicholas the Wonderworker. It is among the emblematic buildings of the city.

Its construction began at the end of the 19th century (the exact date is not known as different architectural projects alternate), and lasts for many years, illuminated in 1914 on the eve of World War I. The building was built on a plot of the Russian Embassy on a project by Mikhail Preobrazhenski specially for the needs of Russian immigrants in the capital.