Fundamental law(s) may refer to:
Organic law, in particular, Constitution, in particular, The Russian Constitution of 1906 The German Grundgesetz (more commonly translated as "Basic Law") The four individual laws that together make up the Constitution of Sweden The Fundamental Laws of England The Fundamental Law of Vatican City State The Fundamental Law of Hungary The Basic Laws of a country that does not use the term "constitution" or has an uncodified constitution Any of the fundamental physical laws of the universe In Abrahmic religions, The Ten Commandments