Buják is a village and municipality in the Pásztó District of Nógrád County, Hungary.

The area has been inhabited since the Late Bronze Age—such finds were discovered on the hill along the road leading to Ecseg, at what is known as Tarisznya-part (haversack coast).

The village probably did not become deserted even until the Turks were expelled, as its population was still larger and purely Hungarian in the early 18th century compared to other settlements.

In the mid-19th century, Bernát Deutsch (1826-1893) became the owner, and in 1884, Count Gyula Károlyi bought the land from him.

The hunting lodge has been a holiday home since 1947, and the observation tower was neglected and damaged, but it was renovated in 2004 with the participation of international volunteers.