Carasi, officially the Municipality of Carasi (; ), is a municipality in the province of Ilocos Norte, Philippines. According to the , it has a population of people, making it the least populated municipality in the province and the entire Ilocos Region, and also the least populous in the island of Luzon.
Carasi is a land-locked town situated in the eastern border of Ilocos Norte. Vintar is situated to the north of Carasi, Calanasan to the east, Nueva Era to the south, and Piddig to the west. Majority of the populated areas of the town are at the foot of the Cordillera Mountains.
Carasi is situated from the provincial capital Laoag, and from the country's capital city of Manila.
Carasi is politically subdivided into 3 barangays. Each barangay consists of puroks and some have sitios.
In the 2024 census, the population of Carasi was 1,775 people, with a density of .
Carasi, belonging to the first congressional district of the province of Ilocos Norte, is governed by a mayor designated as its local chief executive and by a municipal council as its legislative body in accordance with the Local Government Code. The mayor, vice mayor, and the councilors are elected directly by the people through an election which is being held every three years.
The Piddig School District Office governs the public education system within the municipality.