Located in a densely forested area, Kobyłka has been a village at least since the 15th century.

In the 18th century the village was one of the main centres of production of Kontusz Belts.

In 1751 the village was granted with a royal city charter, as an effect of extensive efforts of its owner, Bishop Marcin Załuski, who wanted to turn it into a large centre for pilgrims.

However, the plan failed in the effect of the Kościuszko's Uprising and the Partitions of Poland, during which the town was severely damaged by Russian forces during their march towards the Warsaw's suburb of Praga.

6 connecting Warsaw with Białystok and the border crossing at Kuźnica.