100°

100th meridian east

The meridian 100° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.

The 100th meridian east forms a great circle with the 80th meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 100th meridian east passes through:

Co-ordinates	Country, territory or sea	Notes
90°0′N 100°0′E / 90.000°N 100.000°E / 90.000; 100.000 (Arctic Ocean)	Arctic Ocean
80°39′N 100°0′E / 80.650°N 100.000°E / 80.650; 100.000 (Laptev Sea)	Laptev Sea
79°51′N 100°0′E / 79.850°N 100.000°E / 79.850; 100.000 (Russia)	Russia	Krasnoyarsk Krai — October Revolution Island, Severnaya Zemlya
78°55′N 100°0′E / 78.917°N 100.000°E / 78.917; 100.000 (Kara Sea)	Kara Sea
78°16′N 100°0′E / 78.267°N 100.000°E / 78.267; 100.000 (Russia)	Russia	Krasnoyarsk Krai — Bolshevik Island, Severnaya Zemlya
77°57′N 100°0′E / 77.950°N 100.000°E / 77.950; 100.000 (Kara Sea)	Kara Sea
76°27′N 100°0′E / 76.450°N 100.000°E / 76.450; 100.000 (Russia)	Russia	Krasnoyarsk Krai Irkutsk Oblast — from 58°4′N 100°0′E / 58.067°N 100.000°E / 58.067; 100.000 (Irkutsk Oblast) Republic of Buryatia — from 53°19′N 100°0′E / 53.317°N 100.000°E / 53.317; 100.000 (Buryatia)
51°45′N 100°0′E / 51.750°N 100.000°E / 51.750; 100.000 (Mongolia)	Mongolia
42°39′N 100°0′E / 42.650°N 100.000°E / 42.650; 100.000 (China)	People's Republic of China	Inner Mongolia Gansu — from 40°55′N 100°0′E / 40.917°N 100.000°E / 40.917; 100.000 (Gansu) Inner Mongolia — from 40°17′N 100°0′E / 40.283°N 100.000°E / 40.283; 100.000 (Inner Mongolia) Gansu — from 39°45′N 100°0′E / 39.750°N 100.000°E / 39.750; 100.000 (Gansu) Qinghai — from 38°17′N 100°0′E / 38.283°N 100.000°E / 38.283; 100.000 (Qinghai) Sichuan — from 32°56′N 100°0′E / 32.933°N 100.000°E / 32.933; 100.000 (Gansu) Yunnan — from 28°32′N 100°0′E / 28.533°N 100.000°E / 28.533; 100.000 (Yunnan)
21°42′N 100°0′E / 21.700°N 100.000°E / 21.700; 100.000 (Myanmar)	Myanmar (Burma)
20°25′N 100°0′E / 20.417°N 100.000°E / 20.417; 100.000 (Thailand)	Thailand
12°50′N 100°0′E / 12.833°N 100.000°E / 12.833; 100.000 (Gulf of Thailand)	Gulf of Thailand
12°13′N 100°0′E / 12.217°N 100.000°E / 12.217; 100.000 (Thailand)	Thailand
12°10′N 100°0′E / 12.167°N 100.000°E / 12.167; 100.000 (Gulf of Thailand)	Gulf of Thailand
9°47′N 100°0′E / 9.783°N 100.000°E / 9.783; 100.000 (Thailand)	Thailand	Islands of Ko Pha Ngan and Ko Samui
9°25′N 100°0′E / 9.417°N 100.000°E / 9.417; 100.000 (Gulf of Thailand)	Gulf of Thailand
8°33′N 100°0′E / 8.550°N 100.000°E / 8.550; 100.000 (Thailand)	Thailand
6°34′N 100°0′E / 6.567°N 100.000°E / 6.567; 100.000 (Strait of Malacca)	Strait of Malacca	Passing just east of the Langkawi islands,  Malaysia (at 6°18′N 99°56′E / 6.300°N 99.933°E / 6.300; 99.933 (Langkawi)) Passing just west of Penang Island,  Malaysia (at 5°26′N 100°10′E / 5.433°N 100.167°E / 5.433; 100.167 (Penang))
2°43′N 100°0′E / 2.717°N 100.000°E / 2.717; 100.000 (Malaysia)	Indonesia	Island of Sumatra
0°29′S 100°0′E / 0.483°S 100.000°E / -0.483; 100.000 (Indian Ocean)	Indian Ocean
2°31′S 100°0′E / 2.517°S 100.000°E / -2.517; 100.000 (Malaysia)	Indonesia	Island of North Pagai
2°51′S 100°0′E / 2.850°S 100.000°E / -2.850; 100.000 (Indian Ocean)	Indian Ocean
60°0′S 100°0′E / 60.000°S 100.000°E / -60.000; 100.000 (Southern Ocean)	Southern Ocean
65°39′S 100°0′E / 65.650°S 100.000°E / -65.650; 100.000 (Antarctica)	Antarctica	Australian Antarctic Territory, claimed by  Australia