Ocean Floor Map

Milwaukee Deep map: how deep is it?

Deep: 8,405 m down (GEBCO_2026 grid).

Tap or scroll to load the interactive map

Sea level todayDrag the slider to lower the sea and see the land that would appear.

Sea level in metres below today’s. A simple bathtub model: it lowers the sea everywhere by the same amount and does not simulate how the water would really drain.

Key

Sea depth

  • Deeper than 6,000 m
  • 4,000 to 6,000 m
  • 2,000 to 4,000 m
  • 1,000 to 2,000 m
  • 200 to 1,000 m
  • Shallower than 200 m (the continental shelf)

Land height

  • Land up to 500 m
  • 500 to 2,000 m
  • Above 2,000 m

Drain the oceans

  • Seabed exposed when the sea is lowered A dashed white line marks today’s coast.

How to read the map. Darker blue is deeper water. Tap anywhere to see how deep the sea is there, or how high the land is, and the nearest named undersea feature. Depths come from the GEBCO_2026 grid, which in most of the deep ocean is predicted from satellite measurements of the sea surface rather than surveyed by ship, and the map’s tiles are coarser than the grid, so narrow trenches read shallower on the map than their true depth. Not for navigation.

Milwaukee Deep at a glance

  • 8,405 mdeep in the grid
  • Deeptype of feature
  • 19.58° N, 66.50° Wlisted point
  • Puerto Riconearest country, about 121 km
  • 8,605 mWikidata's own depth
  • 6 of 24deepest of the deeps in our list

Milwaukee Deep is a deep. In the GEBCO grid it reaches 8,405 m below sea level. That figure is the deepest cell in the grid within 20 km of its listed point. The nearest country in our list is Puerto Rico, about 121 km from its listed point.

Open the main map at the deepest cell and tap anywhere to read the depth.

How deep is the Milwaukee Deep?

The grid figure is 8,405 m. We measured it as the deepest cell in the grid within 20 km of its listed point. The cell is at 19.70° N, 66.45° W. The GEBCO_2026 grid has a value every 15 arc-seconds, about 460 m at the equator, so a very narrow feature can be a little deeper or shallower in reality than any grid cell shows.

Wikidata gives 8,605 m, which is 200 m deeper than the grid figure of 8,405 m. Published depths for the same feature often differ like this: they can come from one ship's sounding of one spot rather than a gridded model, or refer to a different part of a long feature. We show both, and use the grid figure in our headline numbers because every depth on this site then comes from one source.

Among the 24 deeps in our list it ranks 6th by depth. The list is the named features on Wikidata with a position at sea, so it is not every deep in the world.

About deeps

A deep is the deepest part of a trench or basin: a small area, often only a few kilometres across, that gets its own name.

This site lists 24 deeps, 13 of them with their own indexed page. See all undersea features.

Nearby undersea features

Distances are between listed points. A long feature such as a trench or ridge has a single listed point on Wikidata.

The deepest deeps in our list

Frequently asked questions

How deep is the Milwaukee Deep?

In the GEBCO grid the figure is 8,405 m. That is the deepest cell in the grid within 20 km of its listed point. Wikidata gives 8,605 m, which is 200 m deeper than the grid figure of 8,405 m. Published depths for the same feature often differ like this: they can come from one ship's sounding of one spot rather than a gridded model, or refer to a different part of a long feature. We show both, and use the grid figure in our headline numbers because every depth on this site then comes from one source.

Where is the Milwaukee Deep?

Its listed point is 19.58° N, 66.50° W, about 121 km from Puerto Rico. The grid's deepest cell for it is at 19.70° N, 66.45° W.

Data: depth from the GEBCO_2026 grid. Name and position from Wikidata Q1700129 (CC0); Wikipedia article. See data sources and licences. The GEBCO Grid should NOT be used for navigation or for any other purpose involving safety at sea.

All undersea features · All oceans and seas · Drain the oceans

Embed this map

Copy this code into your web page. It is free to use. Please keep the link under the map, as it is how people find where the map comes from.