St. Nicholas Chapel (), commonly known as Russian Orthodox Church, is a historic Russian Orthodox church in Seldovia, Alaska, United States. The church was most likely built in 1891 and replaced a log church. Now it is under Diocese of Alaska of the Orthodox Church in America
The church's design features a bell tower with an octagonal, partly open belfry; the tower is topped by a tall cross. The church has a gable roof with a four-sided cupola in the middle, which is topped by another cross.
The chapel was added to the National Register of Historic Places in 1980.