| Official Name: | Vallvik |
| Pushpin Map: | Sweden Gävleborg#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Söderhamn Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Gävleborg County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hälsingland |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.23 |
| Population As Of: | 31 December 2010 |
| Population Total: | 258 |
| Population Density Km2: | 211 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 61.1833°N 28°W |
Vallvik is a locality situated in Söderhamn Municipality, Gävleborg County, Sweden with 258 inhabitants in 2010.
Vallvik mill was built in 1907 and is a sulphate pulp mill belonging to Rottneros AB.
In the community there are old construction villages that were designed by Torben Grut. Vallvik, located at the so-called Virgin coast (Swedish: Jungfrukusten)(named after the Virgin Queen), has a campsite and swimming beach with beach volleyball.