Geography and Population
The province of North Sumatra stretches across the island of Sumatra between the Indian Ocean and the Strait Malacca. It borders Aceh province on the northwest and Riau and West Sumatra provinces in the southeast. It has an area of 72,981 km². The province contains a broad, low plain along the Strait of Malacca on which the provincial capital, Medan, is located. In the south and west, the land rises to the mountain range that runs the length of Sumatra; the mountains here are dominated by Lake Toba, formed from the caldera of an ancient volcano. Several large islands in the Indian Ocean off the west coast of Sumatra are currently part of North Sumatra, most notably Nias and the Batu Islands.
North Sumatra recorded a population of 12,985,075 in the 2010 national census, with a sex ratio of 99.59 men per 100 women.
| Historical population | ||
|---|---|---|
| Year | Pop. | ±% |
| 1971 | 6,621,831 | — |
| 1980 | 8,360,894 | +26.3% |
| 1990 | 10,256,027 | +22.7% |
| 1995 | 11,114,667 | +8.4% |
| 2000 | 11,649,655 | +4.8% |
| 2010 | 12,982,204 | +11.4% |
| Source: Badan Pusat Statistik 2010 | ||
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