| Guincourt | |
| Commune Status: | Commune |
| Arrondissement: | Vouziers |
| Canton: | Attigny |
| Insee: | 08204 |
| Postal Code: | 08130 |
| Mayor: | Dominique Pierre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Crêtes Préardennaises |
| Coordinates: | 49.5581°N 4.6269°W |
| Elevation M: | 149 |
| Area Km2: | 5.31 |
| Website: | https://guincourt.fr/ |
Guincourt (pronounced as /fr/) is a commune in the Ardennes department in northern France, in the former county of Vermandois. It lies just off the old road between Tourteron and Saint-Loup-Terrier.
Jean de Schulemberg (1597-1671), comte de Montejeux, a marshal of France, was born in the château.