| Coordinates | 48°33′N 71°20′W |
|---|---|
| Country | Canada |
| Province | Quebec |
| Region | Saguenay–Lac-Saint-Jean |
| RCM | Le Fjord-du-Saguenay |
| Settled | 1869 |
| Constituted | September 25, 1971 |
| Mayor | Lucien Gravel |
| Federal riding | Jonquière |
| Prov. riding | Dubuc |
| Area total | 150.20 km² |
| Area land | 149.37 km² |
| Population total | 3883 |
| Population as of | 2021 |
| Population density | 26.0 km² |
| Pop (2016–21) | 2.7% |
| Dwellings | 1833 |
| Time zone | EST (UTC−5) |
| Time zone (DST) | EDT (UTC−4) |
| Postal code(s) | G7P 2P9 |
| Area codes | 418 and 581 |
Saint-Ambroise (sɛ̃t‿ɑ̃bʁwaz) is a municipality in Le Fjord-du-Saguenay Regional County Municipality, in the region of Saguenay-Lac-Saint-Jean, Quebec, Canada.