Tønsbergfjorden

{{short description|Fjord in Vestfold, Norway}}

{{Infobox body of water

|name = Tønsbergfjorden

|native_name =

|other_name = Vestfjorden

|image = Tønsbergfjorden in Tønsberg.jpg

|alt =

|caption = View of the fjord

|location = Vestfold county, Norway

|pushpin_map = Norway Vestfold#Norway

|pushpin_label = Tønsbergfjorden

|pushpin_label_position = top

|pushpin_map_caption = Location of the fjord

|basin_countries = Norway

|coords = {{coord|59.191054|10.348434|region:NO_type:waterbody |display=inline, title}}

|type = Fjord

|inflow =

|outflow = Ytre Oslofjord

|catchment =

|length = {{convert|25|km}}

|width = {{convert|5|km}}

|area =

|depth =

|max-depth =

|volume =

|shore =

|frozen =

|islands =

|cities =

|reference =

}}

Tønsbergfjorden is a fjord in Vestfold county, Norway. The {{convert|25|km|adj=on}} long fjord runs between the mainland (Sandefjord Municipality) and the islands of Tjøme and Nøtterøy (Færder Municipality). The fjord has a number of islands located within it including Veierland, Hui, Langø, Natholmen, and the Stauper islands.{{Cite encyclopedia |title=Tønsbergfjorden |encyclopedia=Store norske leksikon |publisher=Kunnskapsforlaget |url=https://snl.no/T%C3%B8nsbergfjorden |date=2023-01-25 |editor-last=Lundbo |editor-first=Sten |language=no |accessdate=2023-11-12 }}

The fjord starts out with a width of about {{convert|5|km}} and as it heads northwards, it narrows considerably, at one point the fjord is only {{convert|250|m}} across. The city of Tønsberg is located at the northern end of the fjord. There is a small canal that runs through Tønsberg and it connects the northern end of the fjord to the Ytre Oslofjord to the east. The southern end of the fjord is where the mouth is, emptying into the Ytre Oslofjord. The mouth lies between Verdens Ende on the east side and the Østerøya peninsula in the west. The small Lahellefjorden is an arm which branches off the Tønsbergfjorden to the west.