Beltiug (German: Bildegg; Hungarian: Krasznabéltek [ˈkrɒsnɒbeːltɛk] or Béltek) is a commune of 3,228 inhabitants situated in Satu Mare County, Transylvania, Romania.

In written sources the settlement was first mentioned in 1216 in the Regestrum Varadinense which introduced all previous judgments in the North West of Transylvania.

In 1216, it refers to a man named Pál from Béltek, who sued the Flemish inhabitants of Batar, Ugocsa County (today a village in the Vynohradiv Raion, Ukraine), since his brother Benedek was killed.

The Flemish did not deny the fact, but they claimed that they killed him because he committed a criminal offense.

In 1565 John Sigismund Zápolya, the king of Hungary, with the Ottomans attacked the castle of Erdőd.

On September 6, 1862 there was a great fire in the settlement, with the exception of 1-2 houses, the whole city and the church burnt down.

At the beginning of the 20th century, a significant number of villagers emigrated to the United States, and most of them settled in Aurora, Illinois.