Mindarus (Ancient Greek: Μίνδαρος) was a Spartan navarch who commanded the Peloponnesian fleet in 411 and 410 BC, during the Peloponnesian War. Successful in shifting the theatre of war into the Hellespont, he then experienced a string of defeats; in the third and final of these, he was killed and the entire Peloponnesian fleet was captured or destroyed.