A concordat is an agreement between the Holy See and a national government. Concordat may also refer to:

• Memorandum of understanding, especially between the central UK government and the devolved Scottish and Welsh administrations
• Concordat of 1801, the reconciliation between Napoleon and the Catholic Church
• Concordat of 2002 between the national government of Georgia and the Georgian Orthodox Church
• The Concordat, in Funny Farm (webcomic), the name of a secret society