 The Regency covers an area of 4,389.40 km2, and had a population of 438,522 at the 2010 Census; the latest official estimate (as at January 2014) is 458,961.It excludes but completely surrounds Bima City.It has two non-contiguous parts, one part is the northern half of Sanggar Peninsula which is dominated by Mount Tambora, and the other half is the easternmost quarter of the island (excluding Bima City).