Sanjhauli, also spelled Sajhauli, is a village and corresponding community development block in Rohtas district of Bihar, India.

[2] Sanjhauli is an entirely rural subdistrict, with no major urban centers.

[2] The sex ratio of Sanjhauli block was 915 in 2011, slightly below the district average of 918.

[2] Members of scheduled castes numbered 10,714 in Sanjhauli block in 2011, making up 17.11% of the population.

34 had telephone coverage, serving 89.45% of the population, and 7 villages had post offices.

3 villages had banks and agricultural credit societies, and 33 had transportation communications (rail, bus, or navigable waterways).