Richardis of Schwerin, also called Richardis of Lauenburg or Rixa, (year unknown – before 1386), was a Duchess consort of Schleswig and possibly a Danish queen consort, married to Valdemar III of Denmark (Valdemar V, Duke of Schleswig).
Richardis is mainly known for an incident in 1358, during the war between her spouse and king Valdemar Atterdag of Denmark.
Atterdag made a siege on Sønderborg castle on Als, which was at the time the residence of Richardis.
This succeeded, and Atterdag agreed to leave her in control of the castle, on condition that she stay out of the war.
In 1373, Richardis made Atterdag the protector of her widow fiefs, including Als.