|District||West Champaran district|
|Time zone||IST (UTC+5:30)|
As of 2011 India census, Langra had a population of 3112 in 649 households. Males constitute 52.57% of the population and females 47.42%. Langra has an average literacy rate of 49.9%, lower than the national average of 74%: male literacy is 61.7%, and female literacy is 38.2%. In Langra, 18.95% of the population is under 6 years of age.
- "Census of India 2011". Retrieved 12 March 2014.
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