Boldog is a municipality in the Hatvan kistérség (Hungarian subregion) of Heves County, Northern Hungary Region .

Boldog is situated between the rivers Zagyva and Galga and at the point of intersection of three counties (comitatus), that of Heves, Jász-Nagykun-Szolnok and Pest.

In the south of the municipality, the remains of the Devil's Dykes take course, that had been built by the Sarmatians between 324 and 337 and that connects the rivers Danube and Tisza.

The costumes of Boldog can be viewed in action yearly on the Jézus Szíve Búcsú (third Sunday after Pentecost).

According to the legend, the "move" was done within a single night and the village leader, judge István Bonta, bumped his stick into the ground of the marsh island saying: "Itt leszünk mi boldogok!"