Fraternitas Baltica was a Baltic-German fraternity founded at Rīga Polytechnic Institute in Riga, Latvia in 1865.

It was established as a collegiate fraternity but decided its members had to belong to Baltic-German military units after World War I.

In 1869 after disagreements, many students left the fraternity and founded Concordia Rigensis, which is still active today.

In 1938, Fraternitas Baltica ceased operations in Latvia and closed completely in 1939 with all the forced removal of its members to Germany.

Its mottos were "In Treuen fest" or "Strong in confidence" and "Freundschaft, Frohsinn, Tugend, Wissen soll man nie bei den Balten missen" which translates as "Friendship, Happiness, Virtue, and Knowledge are the things that none of Balts should miss"