St. James's Cathedral (Latvian: Svētā Jēkaba katedrāle) is the Roman Catholic cathedral of Riga in Latvia.
The cathedral is dedicated to Saint James the Greater. It is frequently referred to by the name St Jacob because Latvian, like many other languages, uses the same name for James and Jacob.
At the beginning of the 15th century the St. Cross Chapel was built at the south end of the early Gothic church, and part of the church was transformed into a basilica. In 1901 the oldest Baroque altar in Riga from 1680 was replaced by a new one.
