Longest Fjords Length Comparison (KM)
Compare the 10 longest fjords by water length, from Scoresby Sound at 350 km to Milford Sound at 16 scale. Lengths in km and miles with survey sources.
Visual comparison
All values
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| Name | Value | Context | Source |
|---|---|---|---|
| Scoresby Sound Longest fjord system in the world. | 350 kilometers | East Greenland, fjord system | Greenland survey: Scoresby Sound 350 km long |
| Sognefjord Longest in Norway. Deepest at 1,308 m. | 205 kilometers | Vestland, Norway | Norwegian survey: Sognefjord 205 km long |
| Hardangerfjord Second longest in Norway. | 179 kilometers | Vestland, Norway | Norwegian survey: Hardangerfjord 179 km long |
| Trondheimsfjord Third longest in Norway. | 130 kilometers | Trondelag, Norway | Norwegian survey: Trondheimsfjord 130 km long |
| Nansen Sound Ice choked most of the year. | 120 kilometers | Nunavut, Canada, Arctic fjord | Canadian survey: Nansen Sound 120 km long |
| King Oscar Fjord Second Greenland entry here. | 110 kilometers | East Greenland | Greenland survey: King Oscar Fjord 110 km long |
| Nordfjord 4 under King Oscar. | 106 kilometers | Vestland, Norway | Norwegian survey: Nordfjord 106 km long |
| Saguenay Fjord 1 under Nordfjord. | 105 kilometers | Quebec, Canada | Quebec survey: Saguenay Fjord 105 km long |
| Lysefjord Short but iconic cliffs. | 42 kilometers | Rogaland, Norway, Preikestolen walls | Norwegian survey: Lysefjord 42 km long |
| Milford Sound Sound by name, fjord by form. Scale anchor. | 16 kilometers | South Island, New Zealand, kept for scale | New Zealand survey: Milford Sound 16 km long |
About this converter
Scoresby Sound runs 350 km in East Greenland, 145 clear of Sognefjord at 205 in Norway. Hardangerfjord at 179, Trondheimsfjord at 130, Nansen Sound at 120, King Oscar Fjord at 110, Nordfjord at 106 and Saguenay Fjord at 105 follow. Lysefjord at 42 and Milford Sound at 16 for scale close the table. Lengths count navigable fjord water from mouth to head. Sounds by name like Scoresby and Milford count here since glaciers cut them as fjords. That naming split is flagged per row.
How to use it
Pick two fjords and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try Scoresby against Sognefjord to see the 145 gap. The bars below scale to Scoresby so Milford looks thin next to it. Switch the unit to miles for US figures. Ratios are exact divisions of the fjord lengths.
Sound vs fjord naming splits this table. Scoresby Sound and Milford Sound are sounds by name but fjords by glacial form, and both are kept with that flagged. Sognefjord depth at 1,308 m is noted but length ranks here. Figures follow Norwegian, Greenland, Canadian, Quebec and New Zealand surveys. Ice and tide lines shift mouth marks by km.
FAQ
What is the longest fjord?
Scoresby Sound at 350 km in East Greenland. It is a sound by name and a fjord by form.
How long is Sognefjord?
205 km. Longest in Norway and deepest at 1,308 m.
Is Milford Sound a fjord?
Yes by form, sound by name. It runs 16 km and is kept for scale.
Why do lengths differ?
Mouth lines. Ice, tide and branch counting shift totals by km between surveys.
Sources
- Surveys: Greenland Scoresby Sound 350, King Oscar Fjord 110; Norway Sognefjord 205, Hardangerfjord 179, Trondheimsfjord 130, Nordfjord 106, Lysefjord 42; Canada Nansen Sound 120; Quebec Saguenay 105; New Zealand Milford Sound 16 km long
Last verified: 2026-10-09 · 10 entries
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