Victorian Premier Ben Carroll has declared the state's upcoming election the most important in a generation, pointing to the growing influence of One Nation as a central reason for the heightened stakes.

Carroll's remarks signal a sharper tone heading into the campaign, with the Premier framing the contest as a critical moment for the state's political direction amid the far-right party's continued push for relevance in Victorian politics.

One Nation has been working to expand its presence in state legislatures across Australia, and Carroll's warning suggests Labor views the party's rise as a serious factor shaping the electoral landscape in Victoria.