- As per official census 2011 and population data 2018 of Lakhisarai district, Hindu are majority in Lakhisarai. Total population of Lakhisarai district is 1,000,912 as per census 2011. Hinduism constitutes 95.55% of Lakhisarai population.
- The district has a population density of 815 inhabitants per square kilometre (2,110/sq mi).
- Lakhisarai has a Sex ratio of 902 Females for every 1000 Males and a literacy rate of 62.42 %.