| Official Name: | San Ildefonso Ixtahuacán |
| Settlement Type: | Municipality |
| Pushpin Map: | Guatemala |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Guatemala |
| Subdivision Type: | Country |
| Subdivision Name: | Guatemala |
| Subdivision Type1: | Department |
| Subdivision Name1: | Huehuetenango |
| Leader Title: | Mayor |
| Area Total Km2: | 135 |
| Population As Of: | 2018 census |
| Population Footnotes: | [1] |
| Population Total: | 44424 |
| Population Density Km2: | auto |
| Population Urban: | 10875 |
| Unit Pref: | Metric |
| Coordinates: | 15.4167°N -91.7667°W |
| Blank Name: | Climate |
| Blank Info: | Cwb |
San Ildefonso Ixtahuacán is a municipality in the Guatemalan department of Huehuetenango, situated at 1580 metres above sea level, with the town of Ixtahuacán as the municipal seat. The municipality has a population of 44,424 (2018 census) and covers an area of 135 km2. The annual festival is January 20–25.