is a town located in Kamikawa Subprefecture, Hokkaido, Japan. , the town had an estimated population of 1,266 in 706 households, and a population density of 2.1 people per km<sup>2</sup>. The total area of the town is . Nakagawa is known for ammonites and other fossils. Its local specialties include sausage and hand-made wood products.
Nakagawa is located an inland area in the northernmost part of the Kamikawa Subprefecture. Surrounded by mountains on both the east and west, the town is located along the Teshio River which runs from east to northwest through the town.
Nakagawa has a Humid continental climate (Köppen Dfb) characterized by cold summers and cold winters with heavy snowfall. The average annual temperature in Nakagawa is 5.9 ðC. The average annual rainfall is 1311 mm with September as the wettest month. The temperatures are highest on average in August, at around 19.6 ðC, and lowest in January, at around -7.4 ðC.
Per Japanese census data, the population of Nakagawa is as shown below. The town is in a long period of sustained population loss.
The area of Nakagawa has been settled since Japanese Paleolithic times, and numerous Jomon period artifacts have been found. The Ainu people had hamlets along the Teshio River. During the Edo period, the area of Nakagawa was part of the territory of the Matsumae Domain. The area was explored by Matsuura Takeshirà  in 1857, but the first Japanese settler did not arrive until 1896. Nakagawa was incorporated as a village on April 1, 1919. It was raised to town status in 1964.
Nakagawa has a mayor-council form of government with a directly elected mayor and a unicameral town council of eight members. Nakagawa, collectively with the other municipalities of Kawakami sub-prefecture, contributes three members to the Hokkaidà  Prefectural Assembly. In terms of national politics, the town is part of the Hokkaidà  6th district of the lower house of the Diet of Japan.
The economy of Nakagawa is overwhelmingly agricultural.
Nakagawa has one public elementary school and one public junior high school operated by the town government. The town does not have a high school.
JR Hokkaido - SÃ Âya Main Line
Nakagawa's mascot is . He is a shape-shaping leaf who lives in a green town since the town's ancient times. He was discovered in September 2012.
Nakagawa has another mascot, a dinosaur that is featured on the town's country sign.