| Official Name: | Mo |
| Settlement Type: | Village |
| Pushpin Map: | Vestland#Norway |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location of the village |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Western Norway |
| Subdivision Name2: | Vestland |
| Subdivision Type3: | District |
| Subdivision Name3: | Nordhordland |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Modalen |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Postal Code Type: | Post Code |
| Postal Code: | 5729 Modalen |
| Elevation M: | 5 |
| Elevation Footnotes: | [1] |
| Coordinates: | 60.815°N 5.8028°W |
Mo is the administrative centre of Modalen municipality, located in northern Vestland county, Norway. The village lies at the mouth of the river Moelva, where it empties into the Romarheimsfjorden (also known as the Mofjorden). The small village has about 100 residents. It is the seat of the municipal government and it is also the site of Mo Church, the only Church of Norway church in the municipality. The church was built in 1883 by the architect Johannes Øvsthus.[2] The main "centre" of the village lies along the shore of the fjord where there are some small shops and a hotel that is run by some Icelanders.
The village was inaccessible by car to the rest of Norway until 1976 when the Modalen Tunnel was built. The north end of the tunnel sits at the east end of the village of Mo and the tunnel cuts through the mountains heading south to the Eksingedalen valley in Vaksdal municipality. In 1996, a road was built along the Mofjorden heading east from Mo which connected it to Alver municipality.