Polystyrene is one of the most commonly used plastics in the world. It is widely used in packaging materials, disposable food containers, insulation products, consumer goods, electronics, and household appliances. Because it is lightweight, affordable, and easy to mold, many industries depend on it. As a result, changes in Polystyrene Prices can directly impact manufacturers, distributors, and end users across the globe.

In the third quarter (Q3) of 2025, the global Polystyrene price trend moved steadily downward across most major regions. Prices declined consistently due to weaker demand from downstream industries such as packaging, consumer goods, electronics, and automotive. The overall market mood remained cautious, mainly because of economic uncertainty and slower industrial activity.

Let’s take a closer look at how the market performed globally and region by region during Q3 2025.