St. Nicholas Chapel, also known as the Santa Claus Church, is a historic Russian Orthodox church in Ekuk, Alaska, United States. The small, single story wood frame building was constructed in 1918 or 1919, replacing an earlier church. When originally built it was 16 feet wide and 21 feet long, but the chamber was subsequently lengthened, and is now 34 feet long. If it were not for its modest exterior religious symbols, it might be mistaken for a rural schoolhouse