North Tapanuli Regency (Tapanuli Utara - in Indonesian, "Utara" means "North") is a landlocked regency in North Sumatra province, Sumatra, Indonesia. Its capital is Tarutung. The regency covers an area of 3,793.71 square kilometers and it had a population of 278,897 at the 2010 Census and 312,758 at the 2020 Census; the official estimate as of mid-2023 was 323,102.

The regency is divided into fifteen districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census and the 2020 Census, together with the official estimates as of mid-2022. The table also includes the locations of the district administrative centres, the number of administrative villages in each district (totalling 241 rural desa and 11 urban kelurahan), and its postcode.

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n Census 2010	Pop'n Census 2020	Pop'n Estimate mid 2022	Admin centre	No. of villages	Post code
12.02.11	Parmonangan	257.35	13,021	14,578	14,737	Manalu	14	22453
12.02.03	Adiankoting	502.90	13,876	15,109	15,255	Adiankoting	16	22461
12.02.04	Sipoholon	189.20	22,265	24,156	24,618	Sipoholon	14	22452
12.02.01	Tarutung	107.68	39,500	42,831	43,694	Tarutung	31	22411 -22417
12.02.02	Siatas Barita	92.92	13,063	14,197	14,386	Simorangkir	12	22417 -22419
12.02.05	Pahae Julu	165.90	11,740	13,494	13,768	Onan Hasang	19	22463
12.02.06	Pahae Jae	203.20	10,569	12,092	12,326	Pasar Sarulla	13	22465
12.02.08	Purbatua	191.80	7,164	8,168	8,282	Parsaoran Janji Angkola	11	22464
12.02.07	Simangumban	150.00	7,300	8,369	8,482	Aek Nabara	8	22466
12.02.13	Pangaribuan	459.25	26,751	29,765	30,263	Pakpahan	26	22472
12.02.14	Garoga	567.58	15,581	18,214	18,530	Garoga Sibargot	13	22473
12.02.12	Sipahutar	408.22	24,536	27,828	28,319	Sipahutar	25	22471
12.02.09	Siborongborong	279.91	44,170	50,641	51,936	Pasar Siborongborong	21	22474
12.02.10	Pagaran	138.05	16,539	18,795	19,134	Sipiltak	14	22458
12.02.15	Muara	79.75	13,182	14,521	14,694	Hutana Nagodang	15	22476
	Totals	3,793.71	279.257	312,758	318,424	Tarutung	252

Note: (a) including 7 of the urban kelurahan of the district's 11 kelurahan. (b) except for the two desa of Jambur Nauli and Sihujur, which have the postcode of 22452.
(c) Muara District is a northern near-exclave of the regency, mainly situated on the southern shore of Lake Toba and connected to Siborongborong District by a narrow strip of land.
It includes the island of Pulau Sibandang (12 km in area, with 2,357 inhabitants in 2020), which is situated in the lake.

Soda Pond, or Aek Rara / Air Soda is located at the bottom of Parbubu I Hill village. The pond's natural spring water generates bubbles and a soda aroma can be smelled. It is safe for swimming, but the use of goggles is recommended. The locals regularly use the water from the pond to water nearby rice paddy fields.

2°00′10″N 99°04′15″E / 2.0028°N 99.0707°E / 2.0028; 99.0707