Atsuma (厚真町 Atsuma-chō) is a town located in Iburi Subprefecture, Hokkaido, Japan.

In March 2017, the town had an estimated population of 4,659, and a density of 12 persons per km². The total area is 404.56 km². The annual town festival is in mid-July, and is called "Inaka Matsuri" or "Country Festival". It is a two-day affair that starts in the main section of town with a parade featuring the Atsuma Dance and continuing the next day with performances at the Atsuma Dam.

Atsuma has several rivers of which the most prominent is the Atsuma River. It is dammed in the northern area of town and continues down through the center of town and empties into the ocean near the ferry terminal and power station. There is a surfing beach nearby where the annual "Hama Matsuri" or "Beach Festival" in early-August.

The Hama-Atsuma railway station on the Hidaka Main Line is in Atsuma.