Decorations are a category of items that a player can use in buy mode to decorate a residential lot or community lot. Depending on the content packs a player owns, the category may include, but is not limited to, rugs, house plants, posters, paintings, sculptures and statues.

Most of these objects improve the environment in varying degrees. More expensive items usually have a higher rating. In addition, some decorative objects have useful functions. For example, the scarecrow in The Sims: Unleashed can deter garden pests, and the lightning rod in The Sims 2: Seasons reduces the chance that objects (and Sims) on a lot will be struck by lightning.

Mirrors also offer different interactions, especially in The Sims 2 and later games.