| Geography | |
|---|---|
| Location | Russian Far East, Pacific Ocean | 
| Coordinates | 51°N 143°E / 51°N 143°ECoordinates: 51°N 143°E / 51°N 143°E | 
| Area | 72,492 km2 (27,989 sq mi) | 
| Area rank | 23rd | 
| Highest elevation | 1,609 m (5,279 ft) | 
| Highest point | Lopatin | 
| Administration | |
| Largest settlement | Yuzhno-Sakhalinsk (pop. 174,203) | 
| Demographics | |
| Population | 497,973 (2010) | 
| Pop. density | 8 /km2 (21 /sq mi) | 
| Ethnic groups | Russians, Koreans, Nivkhs, Oroks, Evenks and Yakuts. | 
| Yuzhno-Sakhalinsk | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Climate chart () | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| J | F | M | A | M | J | J | A | S | O | N | D | 
| 48 −8 −18 | 44 −7 −19 | 42 −2 −13 | 57 5 −4 | 69 12 1 | 54 16 7 | 87 19 11 | 105 21 12 | 107 18 7 | 98 11 0 | 81 2 −7 | 63 −7 −17 | 
| Average max. and min. temperatures in °C | |||||||||||
| Precipitation totals in mm | |||||||||||
| Source: Weather Underground | |||||||||||
| Imperial conversion | |||||||||||
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| J | F | M | A | M | J | J | A | S | O | N | D | 
| 1.9 18 0 | 1.7 19 −2 | 1.7 28 9 | 2.2 41 25 | 2.7 54 34 | 2.1 61 45 | 3.4 66 52 | 4.1 70 54 | 4.2 64 45 | 3.9 52 32 | 3.2 36 19 | 2.5 19 1 | 
| Average max. and min. temperatures in °F | |||||||||||
| Precipitation totals in inches | |||||||||||