Demographics of Bihar

Bihar is the third most populated state of India with total population of 82,998,509 (,243,795 male and 39,754,714 female). Nearly 85% of Bihar's population lives in rural areas. Almost 58% of Biharis are below 25 years age, which is the highest in India. Density is 881. Sex Ratio is 919 females per 1000 males.Since ancient times, Bihar has attracted migrants and settlers including Bengalis, Turksfrom Central Asia, Persians, Afghans and Punjabi Hindu Refugees during the Partition of British India in 1947. Bihar has a total literacy rate of 47% (59.7% for males 33.1% for females).
Source: Wikipaedia

The sex wise comparative literacy rates over last six decades of Bihar

Literacy Rate from 1951~2001
SL	Year	Persons	Males	Females
1	2	3	4	5
1.	1951	13.49	22.68	4.22
2.	1961	21.95	35.85	8.11
3.	1971	23.17	35.86	9.86
4.	1981	32.32	47.11	16.61
5.	1991	37.49	51.37	21.99
6.	2001	47.53	60.32	33.57

District wise Literacy Rates of Bihar

District wise Male Literacy Rates during Census 2001
Rank in 2001		District		Literacy rate
1		2		3
1.		Patna		63.82
2.		Rohtas		62.36
3.		Munger		60.11
4.		Bhojpur		59.71
5.		Aurangabad		57.50
6.		Buxar		57.49
7.		Jehanabad		56.03
8.		Kaimur		55.57
9.		Nalanda		53.64
10.		Siwan		52.01
11.		Saran		52.01
12.		Vaishali		51.63
13.		Gaya		51.07
14.		Bhagalpur		50.28
15.		Sheikhpura		49.01
16.		Begusarai		48.55
17.		Lakhisarai		48.21
18.		Gopalganj		48.19
19.		Muzaffarpur		48.15
20.		Nawada		47.36
21.		Samastipur		45.76
22.		Darbhanga		44.32
23.		Banka		43.40
24.		Jamui		42.74
25.		Madhubani		42.35
26.		Khagaria		41.56
27.		West Champaran		39.63
28.		Sitamarhi		39.38
29.		Saharsa		39.28
30.		East Champaran		38.14
31.		Supaul		37.80
32.		Sheohar		37.01
33.		Madhepura		36.19
34.		Purnia		35.51
35.		Katihar		35.29
36.		Araria		34.94
37.		Kishanganj		31.02
District wise  Female Literacy Rates during Census 2001
Rank in 2001		District		Literacy Rate
1		2		3
1.		Patna		52.17
2.		Munger		47.97
3.		Rohtas		46.62
4.		Bhojpur		42.81
5.		Aurangabad		42.04
6.		Buxar		40.36
7.		Jehanabad		40.08
8.		Nalanda		39.03
9.		Kaimur		38.90
10.		Bhagalpur		38.83
11.		Vaishali		38.14
12.		Gaya		37.40
13.		Siwan		37.26
14.		Begusarai		36.21
15.		Saran		35.74
16.		Muzaffarpur		35.20
17.		Lakhisarai		34.26
18.		Sheikhpura		34.13
19.		Gopalganj		32.81
20.		Samastipur		32.69
21.		Nawada		32.64
22.		Darbhanga		30.35
23.		Khagaria		29.62
24.		Banka		29.10
25.		Sheohar		27.43
26.		Jamui		26.92
27.		Madhubani		26.56
28.		Sitamarhi		26.35
29.		West Champaran		25.85
30.		Saharsa		25.31
31.		East Champaran		24.65
32.		Katihar		24.03
33.		Purnia		23.72
34.		Madhepura		22.31
35.		Araria		22.14
36.		Supaul		21.02
37.		Kishanganj		18.49

District wise Literacy Rate by Sex of the Bihar State

		Literacy Rate*
		Persons		Males		Females
SL	State/District	1991	2001	1991	2001	1991	2001
1	2	3	4	5	6	7	8
	Bihar State	37.49	47.53	51.37	60.32	21.99	33.57
1.	West Champaran	27.99	39.63	39.62	51.91	14.41	25.85
2.	East Champaran	27.59	38.14	39.65	50.14	13.69	24.65
3.	Sheohar	26.18	37.01	36.36	45.54	14.34	27.43
4.	Sitamarhi	28.49	39.38	39.86	51.02	15.49	26.35
5.	Madhubani	33.22	42.35	48.49	57.26	16.75	26.56
6.	Supaul	28.11	37.80	40.96	53.23	13.74	21.02
7.	Araria	26.19	34.94	36.99	46.50	14.01	22.14
8.	Kishanganj	22.22	31.02	33.12	42.80	10.38	18.49
9.	Purnia	28.52	35.51	38.92	46.16	16.80	23.72
10.	Katihar	28.70	35.29	39.24	45.51	16.88	24.03
11.	Madhepura	27.72	36.19	39.31	48.87	14.41	22.31
12.	Saharsa	29.98	39.28	42.37	52.04	15.83	25.31
13.	Darbhanga	34.94	44.32	48.31	57.18	20.09	30.35
14.	Muzaffarpur	36.11	48.15	48.44	60.19	22.33	35.20
15.	Gopalganj	34.96	48.19	51.62	63.81	17.75	32.81
16.	Siwan	39.13	52.01	57.51	67.67	21.33	37.26
17.	Saran	41.79	52.01	60.18	67.81	22.71	35.74
18.	Vaishali	40.56	51.63	55.62	64.00	24.08	38.14
19.	Samastipur	36.37	45.76	50.39	57.83	21.17	32.69
20.	Begusarai	36.88	48.55	48.66	59.71	23.52	36.21
21.	Khagaria	32.33	41.56	42.97	52.02	19.79	29.62
22.	Bhagalpur	41.84	50.28	53.41	60.11	28.11	38.83
23.	Banka	34.55	43.40	48.17	56.28	18.99	29.10
24.	Munger	52.25	60.11	64.95	70.68	37.07	47.97
25.	Lakhisarai	39.40	48.21	53.12	60.97	23.48	34.26
26.	Sheikhpura	40.92	49.01	55.43	62.56	24.41	34.13
27.	Nalanda	46.95	53.64	61.95	66.94	29.97	39.03
28.	Patna	56.33	63.82	69.07	73.81	41.35	52.17
29.	Bhojpur	48.18	59.71	66.35	74.78	27.95	42.81
30.	Buxar	33.49	57.49	62.94	72.82	25.74	40.36
31.	Kaimur	39.35	55.57	55.68	70.57	20.69	38.90
32.	Rohtas	48.52	62.36	64.50	76.54	30.29	46.62
33.	Jehanabad	45.83	56.03	63.11	70.90	26.81	40.08
34.	Aurangabad	45.14	57.50	61.80	71.99	26.67	42.04
35.	Gaya	40.47	51.07	55.22	63.81	24.20	37.40
36.	Nawada	38.96	47.36	54.85	61.22	21.82	32.64
37.	Jamui	33.41	42.74	48.48	57.10	16.41	26.92

* Literacy Rate is the percentage of literates to population of age 7 years and above.