Nagylak (Romanian: Nădlac or Nădlacul Unguresc) is a village in Csongrád-Csanád County, in the Southern Great Plain region of southern Hungary.
It covers an area of 4.7 km2 (2 sq mi) and in 2017 had a population of 433, 6% of whom is of Romanian nationality.
As of 2022, 83.2% of the villagers were Hungarian, 13.7% Romanian, 1.3% Gypsy, 1.1% Slovak, and 0.5% German.