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 km (2 sq mi) and in 2023 had a population of 365.

As of 2022 83.2% were of Hungarian nationality, 13.7% of romanian nationality, 1.3% Rroma, 1.1% Slovakian, 0.5% German, 0.5% Bulgarian, 0.3% Serbian.

As of 2022, 83.2% of the villagers were Hungarian, 13.7% Romanian, 1.3% Gypsy, 1.1% Slovak, and 0.5% German.