Barlin (French pronunciation: [baʁlɛ̃]) is a commune in the Pas-de-Calais department in the Hauts-de-France region in northern France.

In the 12th century, the territory of Barlin was divided into several lordships that depended on Saint-Pol-sur-Ternoise, Arras or Béthune.

The Melun family succeeded him and one of their lords, nicknamed Le Brun, the king's chamberlain, saw his property confiscated by Duke John the Fearless, who had accused him of allegiance with his enemies.

The Duke of Burgundy then donated the land and income of Barlin to Walleran de Juhaucourt.

Today, Barlin is a modern and dynamic place that offers its residents numerous amenities: schools, colleges, a swimming pool, a library and sports halls.