| Závadka nad Hronom | |
| Other Name: | Ágostonlak |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | District |
| Subdivision Name2: | Brezno District |
| Pushpin Map: | Slovakia Banská Bystrica Region#Slovakia |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Závadka nad Hronom in the Banská Bystrica Region##Location of Závadka nad Hronom in Slovakia |
| Coordinates: | 48.85°N 19.92°W |
| Established Title: | First mentioned |
| Established Date: | 1611 |
| Area Footnotes: | [1] |
| Area Total Km2: | 41.18 |
| Elevation Footnotes: | [2] |
| Elevation M: | 618 |
| Population Footnotes: | [3] |
| Population Total: | 2121 |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 976 67 |
| Area Code: | +421 48 |
| Blank Name: | Car plate |
| Blank Info: | BR |
Závadka nad Hronom (hu|Ágostonlak) is a village and municipality in Brezno District, in the Banská Bystrica Region of central Slovakia.