The meridian 173° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, New Zealand, the Southern Ocean, and Antarctica to the South Pole.
The 173rd meridian east forms a great circle with the 7th meridian west.
Starting at the North Pole and heading south to the South Pole, the 173rd meridian east passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| East Siberian Sea | ||
| Russia | ||
| Bering Sea | ||
| United States | Alaska - Attu Island | |
| Pacific Ocean | ||
| Kiribati | Makin Islands | |
| Pacific Ocean | Passing just east of Butaritari atoll, Kiribati | |
| Kiribati | Abaiang and Tarawa atolls | |
| Pacific Ocean | ||
| Kiribati | Maiana atoll | |
| Pacific Ocean | ||
| New Zealand | North Island - North Auckland Peninsula | |
| Pacific Ocean | ||
| New Zealand | South Island | |
| Pacific Ocean | Pegasus Bay | |
| New Zealand | South Island - Banks Peninsula | |
| Pacific Ocean | ||
| Southern Ocean | ||
| Antarctica | Ross Dependency, claimed by New Zealand |
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