Bihar's poll map shows sharp vote share swings amid heavy turnout

JDU dominates with big jumps in vote share while AIMIM suffers sharp declines, even in seats it retained, as Bihar records a strong 66.9% voter turnout

The 2025 Bihar election was one of the most anticipated political events in the state’s recent history. Citizens turned out in large numbers, with voter participation reaching an impressive 66.9 per cent. By 7.40pm, results indicated that 131 candidates had been re-elected out of 167 declared winners, while outcomes in 76 constituencies were still pending. 

Among the constituencies that witnessed a sharp rise in vote share, Rupauli stood out. The Janata Dal (United) (JDU) secured victory once again, increasing its vote share from 34.5 per cent in 2020 to 55.5 per cent in 2025, a remarkable 20.9 per cent jump. The Amarpur constituency also delivered strong gains for JDU, with its vote share rising from 33.1 per cent to 53.8 per cent, marking a 20.6 per cent increase. Meanwhile, the Bharatiya Janata Party (BJP) in Barh recorded the third-highest growth, climbing from 32.9 per cent to 52.5 per cent, a 19.6 per cent increase. 

On the other hand, several constituencies saw a decline in vote share despite re-electing the same party. The All India Majlis-e-Ittehad-ul-Muslimeen (AIMIM) in Bahadurganj retained power but experienced the steepest drop, falling from 49.8 per cent in 2020 to 40.2 per cent in 2025, a 9.6 per cent decline. AIMIM in Amour also faced a setback, with its vote share dipping from 51.2 per cent to 43.5 per cent, a 7.7 per cent decline. Similarly, the party in Kochadhaman saw its vote share shrink from 49.5 per cent to 42.3 per cent, marking a 7.1 per cent decline.