The 2025 Dunlop Super2 Series was an Australian motor racing competition for Supercars as a support series. It was the twenty-sixth running of the Super2 Series, the second tier of competition in Supercars racing.

The Dunlop Series reverted to a single class after competing alongside the Super3 Series class from 2021-2024, officially dropping the Super3 Series due to low grid numbers from the previous year's season with only as many as two or three cars appearing at rounds of the 2024 Dunlop Series Season.

Anderson Motorsport would expand to a two-car team, obtaining a second former Dick Johnson Racing Ford Mustang.

Triple Eight Race Engineering would return to the Super2 series, having last participated in 2022.

Matt Chahda Motorsport has withdrawn from the series.

Eggleston Motorsport would expand to a five-car team.

Image Racing would expand to a two-car team obtaining an ex-Erebus Motorsport Holden Commodore ZB which was last used by Will Brown at the 2022 Auckland SuperSprint.

Tickford Autosport would expand to a four-car team.