Hey!!! As per my knowledge here I am providing you the List of Top Polytechnic Colleges/ University in Bihar

Buddha Institute of Technology (Polytechnic College)
NH-83, Gaya-Dobhi Road, Behind Rituraj Cold Storage), Industrial Area, Plot No. B-3 (P) Gaya, Bihar
Phone : (0631) 2224779

Government Polytechnic Darbhanga
P.O. Lal Bagh Darbhanga, Bihar
Phone : (06272) 210053
Mobile : 9006365253

Government Polytechnic Saharsa
Industrial Area Saharsa, Bihar
Phone : (06478) 223517
Mobile : 9431861586

Government Women’s Polytechnic Muzaffarpur
Gannipur Muzaffarpur, Bihar
Phone : (0621) 2242246, 22266171
Mobile : 9334328058, 9471001781, 9471001782

Government Women’s Polytechnic Patna
P.O. Sahai Nagar, Phulwarisharif Patna, Bihar
Phone : (0612) 2225934
Fax : (0612) 2225934

Millia Polytechnic
Rambagh Purnia, Bihar
Phone : (06454) 240433
Fax : (06454) 240434

New Government Polytechnic
Patliputra Colony Patna, Bihar
Phone : (0612) 2262866
Mobile : 9304776908
Fax : (0612) 2262700

Northern East Motor Vehicle Institution India Ltd.
Campus- Back of Batala Factory, Saguna-Khagaul Road, Garikhana, Khagaul Patna, Bihar
Mobile : 9934011110, 7631716675

Patna Sahib Polytechnic College (PSPC)
Midway Patna-Muzaffarpur Highway, Bhagwanpur (Vaishali) Patna, Bihar
Phone : (0612) 6500617, 6500618, 6500619
Mobile : 9263709120, 9263672717