The Principality of Mingrelia (Georgian: სამეგრელოს სამთავრო, romanized: samegrelos samtavro), also known as Odishi and as Samegrelo, was a historical state in Georgia ruled by the Dadiani dynasty.

The principality emerged out of a non-aggression pact and an ensuing treaty signed by Konstantine II of Kartli, Alexandre of Kakhetia, and Qvarqvare II, atabag of Samtshke, which divided Georgia into three kingdoms and a number of principalities.

[1] Mingrelia was established as an independent Principality in 1557 with Levan I Dadiani serving as a hereditary mtavari (Prince).

[2] This came after it signed a patronage treaty with the Russian Empire,[3] which was concluded in return for Russian protection against the harassment of Mingrelia's more powerful neighbors, Imeretia and Abkhazia.

Prince Niko officially renounced his rights to the throne in 1868 and the state became a Russian district until 1917.