Datanomics: Incumbents boosted JD(U) and BJP vote share in Bihar

Only 64 constituencies or one-fourth of the total strength of the house had re-elected the same parties in 2010

Over half of the 243 Assembly seats elected the incumbents in the just-concluded Bihar elections. In 2010, this proportion was just one-fourth, as 63 constituencies re-elected incumbents. Notably, both the BJP and JD(U) registered a rise in their vote share in most of the constituencies where they were re-elected this time.

 

Chart 1: Constituencies that voted for same parties up 3x

 

The share of seats sending incumbents to the Assembly rose significantly, from 26 per cent in 2010 to 53 per cent in 2025. The number of constituencies where parties were re-elected and registered an increase in vote share grew