| Lyster | |
| Settlement Type: | Municipality |
| Pushpin Map: | Canada Southern Quebec |
| Pushpin Map Caption: | Location in southern Quebec |
| Coordinates: | 46.3667°N -108°W |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Quebec |
| Subdivision Type2: | Region |
| Subdivision Name2: | Centre-du-Québec |
| Subdivision Type3: | RCM |
| Subdivision Name3: | L'Érable |
| Established Title1: | Constituted |
| Established Date1: | September 18, 1976 |
| Named For: | Leicester |
| Leader Title: | Mayor |
| Leader Name: | Sylvain Labrecque |
| Leader Title1: | Federal riding |
| Leader Name1: | Mégantic—L'Érable |
| Leader Title2: | Prov. riding |
| Leader Name2: | Arthabaska |
| Area Total Km2: | 167.80 |
| Area Land Km2: | 167.55 |
| Population Total: | 1587 |
| Population As Of: | 2021 |
| Population Density Km2: | 9.5 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 1.1% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 776 |
| Timezone: | EST |
| Utc Offset: | −5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −4 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | G0S 1V0 |
| Area Code: | 819 |
| Blank Name: | Highways |
| Blank Info: | |
Lyster is a municipality in the Centre-du-Québec region of the province of Quebec in Canada. It was created with the fusion of the Sainte-Anastasie parish and the village of Lyster in 1976.