| Nižný Komárnik | |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Type2: | Region |
| Subdivision Name2: | Prešov |
| Subdivision Type3: | District |
| Subdivision Name3: | Svidník |
| Pushpin Map: | Slovakia Prešov Region#Slovakia |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Nižný Komárnik in the Prešov Region##Location of Nižný Komárnik in Slovakia |
| Coordinates: | 49.3833°N 63°W |
| Established Title: | First mentioned |
| Established Date: | 1618 |
| Area Total Km2: | 12.381 |
| Elevation M: | 370 |
| Population Total: | 148 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 090 05 (pošta Krajná Poľana) |
| Area Code: | +421-54 |
| Blank Name: | Car plate |
| Blank Info: | SK |
Nižný Komárnik (hu|Alsókomárnok) is a village and municipality in Svidník District in the Prešov Region of north-eastern Slovakia.
In historical records the village was first mentioned in 1618.
The municipality lies at an altitude of 370 metres and covers an area of 12.381 km2. It has a population of about 148 people.