List of Chief Ministers of Bihar

1.Shri Krishna Singh( 02.04.1946 - 31.01.1961 )
2.Shri Deep Narayan Singh( 01.02.1961-18.02.1961 )
3.Shri Binonand Jha(18.02.1961-02.10.1963)
4.Shri KB Sahay( 02.10.1963-05.03.1967)
5.Shri Mahamaya Prasad Sinha( 05.03.1967-28.01.968 )
6.Shri Satish Prasad Singh(28.01.1968-01.02.1968)
7.Shri B P Mandal(01.02.1968-02.03.1968)
8.Shri Bhola Paswan Shastri(22.03.1968 - 29.06.1968)(President's rule)Government under Artilce-356 of constitution(29.06.1968-26.02.1969)
9.Shri Harihar Pd. Singh(26.02.1969 - 22.06.1969)
10. Shri Bhola Paswan Shastri(22.06.1969 - 04.07.1969)
 (President's rule)Government under Artilce-356 of constitution(06.07.1969 - 16.02.1970)
11.Shri Daroga Prasad Ray(16.02.1970 - 22.12.1970)
12.Karpoori Thakur(22 December 1970-2 June 1971)
13.Bhola Paswan Shastri (2 June 1971-9 January 1972)(President's rule)Government under Artilce-356 of constitution(09.01.1972 - 19.03.1972)
14.Shri Kedar Pandey( 19.03.1972 - 02.07.1973)
15.Shri Abdul Gafoor(02.07.1973 - 11.04.1975)
16.Shri Dr. jagannath Mishra(11.04.1975 - 30.04.1977)(President's rule)Government under Artilce-356 of constitution(30.04.1977 - 24.06.1977)
17.Shri Karpoori Thakur(24.06.1977 - 21.04.1979)
18.Shri Ram Sundar Das(21.04.1979 - 17.02.1980)(President's rule)Government under Artilce-356 of constitution(17.02.1980 - 08.06.1980)
19.Jagannath Mishra(8 June 1980-14 August 1983)
20.Shri Chandra Shekhar Singh(14.08.1983 - 12.03.1985)
21.Shri Bindeswari Dubey(12.03.1985 - 13.02.1988)
22.Shri Bhagwat Jha Azad(14.02.1988 - 10.03.1889)
23.Shri Satyendra Narayan Singh(11.03.1989 - 06.12.1989)
24.Shri Laloo Prasad(10.03.1990 - 03.04.1995)
Vacant(President's rule)(28 March 1995-4 April 1995)
25.Lalu Prasad Yadav( 4 April 1995-25 July 1997)    
26.Smt. Rabri Devi(25.07.1997 - 11.02.1999)(President's rule)Government under Artilce-356 of constitution(12.02.1999 - 08.03.1999)
27.Rabri Devi(9 March 1999-2 March 2000)
28.Nitish Kumar(3 March 2000-10 March 2000)
29.Rabri Devi(11 March 2000-6 March 2005)(President's rule)Government under Artilce-356 of constitution(07.03.2005 - 24.11.2005)
30.Shri Nitish Kumar(24.11.2005 - Till Date)

Source:

• Wikipedia
• http://cm.bih.nic.in/formercm-bihar.htm