The regency covers an area of 2,021.8 square kilometres; it had a population of 173,129 at the 2010 census[2] and 206,199 at the 2020 Census;[3] the official estimate as at mid 2023 was 213,850 (comprising 106,907 males and 106,943 females).

[1] Although landlocked, the regency includes the eastern shore of the vast inland Lake Toba.

[1] The table also includes the locations of the district administrative centres, the number of administrative villages in each district (231 rural desa and 13 urban kelurahan), and its post code: Notes: (a) comprising 6 kelurahan (Balige I, Balige III, Lumban Dolok Haumabange, Napitupulu Bagasan, Pardede Onan and Sangkar Nihuta) and 29 desa.

Two scientists explored the Eden Park tourist forest in Sionggang village in Toba Regency for four years and have successfully identified almost 200 new species of forest orchids.

[5] Sigura-gura waterfall, which is the highest waterfall in Indonesia at 250 metres (820 ft) tall, is located 250 kilometres (160 mi) from Medan or a 2 to 3 hour long drive.