| Beaulac-Garthby | |
| Settlement Type: | Municipality |
| Image Blank Emblem: | Beaulac garthby logo.PNG |
| Blank Emblem Size: | 100px |
| Pushpin Map: | Canada Southern Quebec |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in province of Quebec |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Region |
| Subdivision Name2: | Chaudière-Appalaches |
| Subdivision Type3: | RCM |
| Subdivision Name3: | Les Appalaches |
| Established Title1: | Constituted |
| Established Date1: | March 15, 2000 |
| Leader Title: | Mayor |
| Leader Name: | Loic Lenoir |
| Leader Title1: | Federal riding |
| Leader Name1: | Mégantic—L'Érable |
| Leader Title2: | Prov. riding |
| Leader Name2: | Mégantic |
| Area Total Km2: | 93.90 |
| Area Land Km2: | 75.96 |
| Population Total: | 931 |
| Population As Of: | 2021 |
| Population Density Km2: | 12.3 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 2.9% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 814 |
| Timezone: | EST |
| Utc Offset: | −5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −4 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | G0Y 1B0 |
| Area Codes: | 418 and 581 |
| Blank Name: | Highways |
| Blank Info: | |
Beaulac-Garthby is a municipality in Municipalité régionale de comté des Appalaches in Quebec, Canada. It is part of the Chaudière-Appalaches region and the population is 931 as of 2021. The municipality, located on Lake Aylmer, was created in 2000 following the amalgamation of the village of Beaulac and the township of Garthby.