Rumoi, Hokkaido

Rumoi
留萌市
Panorama view of Rumoi, from Senboudai
Location of Rumoi in Hokkaido (Rumoi Subprefecture)
Rumoi
Location in Japan
Coordinates: 43°56′27″N 141°38′13″E / 43.94083°N 141.63694°E / 43.94083; 141.63694
CountryJapan
RegionHokkaido
PrefectureHokkaido (Rumoi Subprefecture)
Government
  MayorShunji Nakanishi
Area
  Total
297.81 km2 (114.99 sq mi)
Population
 (January 31, 2025)
  Total
18,132
  Density61/km2 (160/sq mi)
Time zoneUTC+09:00 (JST)
City hall address1-11, Saiwaichō, Rumoi-shi, Hokkaidō 077-8601
ClimateDfb
WebsiteOfficial website
Symbols
FlowerAzalea
TreeAcacia

Rumoi (留萌市, Rumoi-shi) is a city in Rumoi Subprefecture, Hokkaido, Japan. As of 31 January 2025, the city had an estimated population of 18,132 in 10519 households, and a population density of 61 people per km2. The total area of the city is 297.81 km2 (114.99 sq mi). There are several theories about the origin of the name, which comes from the Ainu word for the Rumoi River. The word "rur-mo-ot-pe," means "a river with calm, constant tides," or "a river with deep tides," and this theory has been adopted by the city.