St James's Cathedral (Latvian: Svētā Jēkaba katedrāle, German: Jakobskirche) is the Roman Catholic cathedral of Riga in Latvia. The cathedral is dedicated to Saint James the Greater. The building is part of the Old Riga UNESCO World Heritage Site and lies directly opposite the House of the Livonian Noble Corporation, the meeting place of Latvia's parliament the Saeima.

The church is sometimes misleadingly called St. Jacob's. The confusion arises because English, unlike most languages, uses different names for the Old Testament name Jacob and the New Testament name James.