ATLAS · SEAPORTS · UNITED STATES
Seaports in United States
United States has 666 portsin the World Port Index — 21 large deep-water ports, 38 medium and 607 smaller harbours. They sit on North Atlantic Ocean, Gulf of Mexico; North Atlantic Ocean, North Pacific Ocean. Below: how they split by size, and the biggest harbours. From the NGA World Port Index, snapshot 2026-06-22.
PORTS666
LARGE · MEDIUM21 · 38
ONNorth Atlantic Ocean
By harbour size
Large21 · 3%
Medium38 · 6%
Small132 · 20%
Very small475 · 71%
Biggest ports in United States
The largest harbours in the snapshot, with their water body and harbour type.
largeBaltimoreNorth Atlantic Ocean · River (Natural) · US BAL
largeBostonNorth Atlantic Ocean · Coastal (Natural) · US BOS
largeBrooklynNorth Atlantic Ocean · River (Natural) · US BOY
largeBuffaloLake Erie; Great Lakes · Coastal (Breakwater) · US BUF
largeChesterNorth Atlantic Ocean · River (Natural) · US CHT
largeClevelandLake Erie; Great Lakes · Coastal (Breakwater) · US CLE
largeDetroitLake Erie; Great Lakes · River (Natural) · US DET
largeGalvestonGulf of Mexico; North Atlantic Ocean · Coastal (Natural) · US GLS
largeHoustonGulf of Mexico; North Atlantic Ocean · River (Tide Gates) · US HOU
largeLoop TerminalGulf of Mexico; North Atlantic Ocean · Open Roadstead · US LO9
largeLos AngelesNorth Pacific Ocean · Coastal (Breakwater) · US LAX
largeMobileGulf of Mexico; North Atlantic Ocean · River (Natural) · US MOB
Ports in other countries
Canada · United Kingdom · Japan · Norway · Indonesia · Italy · Sweden · Philippines