Toba Samosir Regency abbreviated as Tobasa is a regency in North Sumatra. Its seat is Balige. The regency covers an area of 2,352.35 square kilometres and according to the 2010 census it had a population of 172,933; the latest estimate (for January 2014) is 180,407. It includes the eastern shore of the vast inland Lake Toba.
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