100th east longitude meridian
The 100th east longitude meridian is the line of longitude , 100 degrees east of the Greenwich meridian , passing from the North Pole through the Arctic Ocean , Asia , the Indian Ocean , the Antarctic Ocean to the South Pole and forming an orthodromy with the 80th west longitude meridian .
Starting from the North Pole and south to the South Pole, the 100th meridian of east longitude passes through:
| Coordinates (approximated) | Country, Territory or Sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Laptev sea | ||
 Russia | October Revolution Island , Severnaya Zemlya | |
| Kara Sea | ||
| Russia | Bolshevik Island , Severnaya Zemlya | |
| Kara Sea | ||
| Russia | ||
 Mongolia | ||
 China | ||
 Myanmar | ||
 Thailand | ||
| Gulf of Thailand | ||
| Thailand | ||
| Gulf of Thailand | ||
| Thailand | Koh Phangan and Koh Samui | |
| Gulf of Thailand | ||
| Thailand | ||
| Strait of Malacca | Passes east of the Langkawi Islands ,  MalaysiaPasses west of Penang Island , Malaysia | |
 Indonesia | Sumatra Island | |
| Indian Ocean | ||
| Indonesia | North Pagay | |
| Indian Ocean | ||
| Antarctic Ocean | ||
| Antarctica | Australian Antarctic Territory Claim  Of Australia |