Limanu is a commune in Constanța County, Northern Dobruja, Romania. At the 2011 census, Limanu had 5,337 Romanians, 8 Hungarians, 8…Limanu is a commune in Constanța County, Northern Dobruja, Romania. At the 2011 census, Limanu had 5,337 Romanians, 8 Hungarians, 84 Roma, 3 Germans, 6 Turks, 179 Tatars, 178 Lipovans, 4 others, 465 with undeclared ethnicity.