Obs is a chain of 31 hypermarkets throughout Norway managed by Coop Norge and owned by local cooperatives.

The chain director is Lars Midttun.

[1] The first hypermarket opened in Trondheim in 1968 under the name DOMUS Stormarked.

Some of the Obs stores have Obs BYGG construction and hardware stores.

As of 2024, there are 31 Obs hypermarkets in Norway:[3]