Tropes appearing in this opera:
- Evil Sounds Deep: Ortrud and Telramund are alt and baritone respectively.
- Lohengrin and Mendelssohn: The bridal chorus "Treulich geführt ziehet dahin" that opens Act III is one of the two constituents of this trope.
- Mr. Exposition: The King's Herold (Heerrufer).
- Pimped-Out Dress: In the 2010 production by Hans Neuenfel, Elsa and Ortrud wear the same dress to Elsa's wedding. The dresses have Opera Gloves, a sparkling bodice, and skirts covered with feathers. The difference is Elsa's dress is white like a Fairytale Wedding Dress, and Ortrud's dress is black.
- Reasonable Authority Figure: King Heinrich.
- Summoning Artifact: The eponymous Swan Knight, forced to leave his wife, gives her a horn to give to her brother if she ever sees him again, promising that the horn will bring aid in danger (presumably when blown).
- Trial by Combat: The swan knight fights Telramund in judicial combat as Elsa's champion.
- Villainous Breakdown: Telramund has an epic one in the beginning of Act II.
- Ortrud in the end, when Lohengrin reverts her spell and turn the swan back into Gottfried.