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Demographics & Census

Bihar Census 2011 & Caste-Based Survey: Sex Ratio, Literacy & High-Yield MCQs

Demographic Research Unit (Census & Social Data Analysts) • 12 min read • Published: 2026-10-31

Master demographic questions for 72nd BPSC. Complete district rankings from Census 2011 (Population: 10.41 Crore, Sex Ratio: 918, Density: 1,106/sq km) and key findings from Bihar’s Caste-Based Survey.

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1. Census 2011 Core Demographic Benchmarks

According to Census 2011, Bihar’s total population stands at 10,40,99,452 (~10.41 Crore), making it the 3rd most populous state in India (behind Uttar Pradesh and Maharashtra) accounting for 8.60% of India’s population.

Bihar ranks 1st in population density among Indian states at 1,106 persons per square kilometer (Sheohar is the most densely populated district at 1,880/sq km, while Kaimur is the least at 488/sq km).

Top and Lowest Ranked Districts in Bihar (Census 2011)
Demographic ParameterHighest District in BiharLowest District in Bihar
Total PopulationPatna (58.38 Lakh)Sheikhpura (6.36 Lakh)
Population DensitySheohar (1,880 persons/km²)Kaimur / Bhabhua (488 persons/km²)
Sex Ratio (Females / 1000 Males)Gopalganj (1,021 - only >1000 district)Munger (876) & Bhagalpur (880)
Child Sex Ratio (0–6 Years)Kishanganj (971)Vaishali (904)
Overall Literacy Rate (61.8%)Rohtas (73.37%)Purnea (51.08%)
Male Literacy Rate (71.2%)Rohtas (82.88%)Purnea (59.06%)
Female Literacy Rate (51.5%)Rohtas (62.97%)Saharasa (41.68%)
Decadal Population Growth (25.42%)Madhepura (31.12%)Gopalganj (19.02%)

2. Key Takeaways from Bihar Caste-Based Survey

The Bihar Caste-Based Survey enumerated a total population of 13.07 Crore across the state.

Extremely Backward Classes (EBCs) constitute 36.01%, Backward Classes (BCs) 27.12%, Scheduled Castes (SC) 19.65%, Scheduled Tribes (ST) 1.68%, and Unreserved General category 15.52% of Bihar’s population.