The Bharatiya Janata Party (BJP) won the West Bengal Legislative Assembly election on May 5, 2026, ending the 15-year rule of Mamata Banerjee [1, 2].

This victory marks a seismic shift in the political landscape of eastern India. By displacing the Trinamool Congress, the BJP has dismantled a long-standing regional stronghold and expanded its governance footprint across the state.

According to reported results, the BJP secured 206 seats in the assembly [1]. This total significantly exceeds earlier exit poll predictions, which suggested the party would win between 150 and 175 seats [3]. While some early predictions described the potential outcome as a narrow win [4], the final numbers indicate a more decisive sweep.

The scale of the victory was bolstered by high margins of victory in several areas. Specifically, 108 constituencies were won by a margin of over 25,000 votes [1].

Analysts said the win is due to a broad voter shift across multiple regions. The BJP gained a massive mandate from voters in the Presidency area, Medinipur, and Jalpaiguri [1]. This geographic diversity in support suggests the party's appeal extended beyond traditional strongholds.

The results announced yesterday [2] signify the end of the era led by Mamata Banerjee and the Trinamool Congress. The BJP is now set to form the state government and appoint a new Chief Minister for West Bengal [1, 2].

The BJP won the West Bengal Legislative Assembly election on May 5, 2026, ending the 15-year rule of Mamata Banerjee.

The transition of power in West Bengal represents a significant consolidation of power for the BJP in India. By overturning a 15-year incumbency, the party has demonstrated an ability to penetrate regional bastions that were previously resistant to its platform, potentially altering the balance of power in future national elections.