Intercantonal concordat

An intercantonal concordat or intercantonal agreement is a treaty between Swiss cantons that create unified public law and legal obligations. Due to Switzerland's federalist structure, these agreements have played a significant role in Swiss governance during the 19th and 20th centuries. The term "concordat" was adopted from religious agreements, as the first intercantonal treaty in 1803 dealt with confessional matters.

Today, concordats are authorized under Article 48 of the Swiss Federal Constitution and remain subject to federal law, though they have diminished in importance due to the expansion of federal legislation.