The name of the village comes from the Turkish words moru, mori (blue) and ghiol meaning lake.

The first documentary attestation appears in Turkish registers of 1543 where the name was Mor-Kasim. Turkish documents from 1864-1877 mention the same settlement with the name Mori-gol.

The locality was founded by the Tartars from Crimea; in this place, they found land good for cultivation and for grazing, without paying taxes to the Ottoman Empire. After the war in 1877-1878, most of the Mahommedan people leaved the area and the Lipovans from neighbouring communes Caraorman and Uzlina, whose main occupation was fishing, occupied it.

The archaeological traces discovered in the area belong to the first and the second epoch of Iron, Roman epoch and Middle Age. The most important historical objective is Halmirys fortress, situated on a rocky promontory, 2.5 km east from Murighiol, on the right bank of Sfântu Gheorghe branch. On this promontory, the archaeological investigations revealed archaeological traces from VI-I B.C. The proper citadel passed through many evolutionary stages: earth defence works (last quarter of I A.D.), rock Roman camp (beginning of II – third quarter of III A.D.), Later Roman fortress (third quarter of III – first quarter of VII A.D.); near the fortress, through the west, a large civil settlement from the same period is present.