| Harhaj | |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Type2: | Region |
| Subdivision Name2: | Prešov |
| Subdivision Type3: | District |
| Subdivision Name3: | Bardejov |
| Pushpin Map: | Slovakia Prešov Region#Slovakia |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Harhaj in the Prešov Region##Location of Harhaj in Slovakia |
| Coordinates: | 49.1833°N 46°W |
| Established Title: | First mentioned |
| Established Date: | 1426 |
| Area Total Km2: | 4.43[1] |
| Area Total Sq Mi: | 1.71 |
| Elevation M: | 212[2] |
| Elevation Ft: | 696 |
| Population Total: | 260[3] |
| Population Density Km2: | 59.08[4] |
| Population Density Sq Mi: | 22.81 |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 086 45 |
| Area Code: | +421 54 |
| Blank Name: | Car plate |
| Blank Info: | BJ |
Harhaj (Hungarian: Herhely) is a village and municipality in Bardejov District in the Prešov Region of north-east Slovakia.
In historical records the village was first mentioned in 1426. Before the establishment of independent Czechoslovakia in 1918, Harhaj was part of Sáros County within the Kingdom of Hungary. From 1939 to 1945, it was part of the Slovak Republic. On 19 January 1945, the Red Army dislodged the Wehrmacht from Harhaj and it was once again part of Czechoslovakia.
The municipality lies at an altitude of 200 metres and covers an area of 4.434 km².It has a population of about 245 people.
The records for genealogical research are available at the state archive "Statny Archiv in Presov, Slovakia"