Sigma Delta Kappa (ΣΔΚ) was an American professional fraternity in the field of law.

Sigma Delta Kappa was founded as a men's professional fraternity for law at the University of Michigan on August 14, 1914.

[9] The Sigma Delta Kappa badge was a shield, shaped like a coffin, with the Greek letters ΣΔΚ in gold on a black background.

[10] Its coat of arms included a checkered shield with six stars arranged diagonally.

Over the shield was an owl holding balance scales in its beak, surrounded by a folded weath.