Rajpur is a village and corresponding community development block in Buxar district of Bihar, India.

[2] Rajpur is an entirely rural block, with no major urban centres.

Members of scheduled castes made up 19.43% of the block population, the highest proportion among blocks in Buxar district, and members of scheduled tribes made up 0.31%.

[2] A majority of workers in Rajpur block worked in agriculture as of 2011, with 26.69% of workers being cultivators who owned or leased their own land and 60.01% being agricultural labourers who worked someone else's land for wages.

[2] There are 236 villages in Rajpur block, 176 of which are inhabited and 60 of which are uninhabited.