As per your request below are the top colleges of Karnataka engineering college:

Top Engineering Colleges of Karnataka in 2015
R.V. College of Engineering at Bangalore
BMS College of Bangalore at Bangalore
PES Institute of Technology at Bangalore

IITs/NITs/IIITs
NIT Surathkal, Surathkal
IIIT Bangalore Bangalore

Other Deemed Universities/Central Universities
Manipal Institute of Technology, Manipal

Some other engineering colleges:

BMS College of Engineering,, Bangalore
R.V. College of Engineering, Bangalore
PES Institute of Technology, Bangalore
Bangalore Institute of Technology, Bangalore
M.S. Ramaiah Institute of Technology, Bangalore
Sir M Visvesvaraya Institute of Technology, Bangalore
Acharya Institute of Technology, Soldevanahalli
B.N.M Institute of Technology, Bangalore
BMS Institute of Technology, Avalahalli
Dayanand Sagar College of Engineering, Bangalore
JSS Academy of Technical Education, Uttarahalli
New Horizon College of Engineering, Bangalore
RNS Institute of Technology, Channasandra
Siddaganga Institute of Technology, Tumkur
Sri Jayachamarajendra College of Engineering, Mysore
The National Institute of Engineering, Mysore
University Visversvaraya College of Engineering, Bangalore
B.V.Bhoomaraddi College of Engineering and Technology, Hubli
Bapuji Institute of Engineering & Technology, Davangere
BLDEA’s V.P.Dr.P.G.Halakatti College of Engineering & Technology, Bijapur
CMR Institute of Technology, Bangalore
Dr. Ambedkar Institute of Technology, Bangalore
Ghousia College of Engineering, Ramanagaram
Global Academy of Technology, Bangalore
K.L.E. Society’s B.V. Bhoomaraddi College of Engineering & Technology, Hubli
KLS Gogte Institute of Technology, Belgaum
MVJ College of Engineering, Bangalore
Nitte Meenakshi Institute of Technology, Gollahalli
NMAM Institute of Technology, Karkala
PES School of Engineering Bangalore
Rao Bahadur Y.Mahableswarappa Engineering, College Bellary
Reva Institute of Technology and Management, Kattigenahalli
Sambhram Institute of Technology, Bangalore
Sapthagiri College of Engineering, Bangalore
SDM College of Engineering & Technology, Dharwad
SJB Institute of Technology, Bangalore
Smt Kamala Sri Venkappa M Agadi College of Engg & Tech, Laxmeshwar
T John Institute of Technology, Bangalore
Yellamma Dasappa Institute of Technology, Raghuvanahalli
APS College of Engineering, Bangalore
Ballari Institute of Technology & Management, Bellary
Canara Engineering College, Bantwal
City Engineering College, Doddakallsandra
Don Bosco Institute of Technology, Kumbalagodu
Dr.T.Thimmaiah Institute of Technology, Kolar
GSS Institute of Technology, Kommaghatta
GSSS Institute of Engineering and Technology for Women, Mysore
Jawaharlal Nehru National College of Engineering, Shimoga
K.L.E. Society’s College of Engineering and Technology, Belgaum
K.S. Institute of Technology, Raghuvanahalli
Kalpataru Institute of Technology, Tiptur
KLS’s Vishwanathrao Deshpande Rural Institute of Technology, Haliyal
R.R.Institute of Technology, Bangalore
Rajiv Gandhi Institute of Technology, Bangalore
Rural Engineering College, Bhalki
Shirdi Sai Engineering College, Saileo Nagar,
Sri Bhagawan Mahaveer Jain College of Engineering, Kanakapura Taluk
Sri Siddhartha Institute of Technology, Tumkur
Srinivas Institute of Technology, Mangalore
Vemana Institute of Technology, Koramangala
Vidyavardhaka College of Engineering, Mysore
Adichunchanagiri Institute of Technology, Chikmagalur
AMC Engineering College, Bangalore
Atria Institute of Technology, Bangalore
Bangalore College of Engineering & Technology, Bangalore
Basaveshwar Engineering College, Bagalkot
BTL Institute of Technology & Management, Bangalore
Cambridge Institute of Technology, Bangalore
Channabasaveshwara Institute of Technology, Gubbi
East Point College of Engineering & Technology, Bangalore
East West Institute of Technology, Bangalore
GM Institute of Technology, Davangere
Guru Nanak Dev Engineering College, Bidar Bidar
H.K.E.Society’s Poojya Doddappa Appa College of Engineering, Gulbarga
HKBK College of Engineering, Bangalore
K N S Institute of Technology, Bangalore
K.V.G. College of Engineering, Sullia
Khaja Nawaz College of Engineering, Gulbarga
M.S. Engineering College, Bangalore
Maharaja Institute of Technology, Mandya
Malnad College of Engineering, Hassan
Maratha Mandal’s Engineering College, Belgaum
Moodlakatte Institute of Technology, Kundapura
Nagarjuna College of Engineering & Technology, Bangalore
P.E.S. College of Engineering, Mandya
PES Institute of Technology & Management, Shimoga
R.L.Jalappa Institute of Technology, Doddaballapur
Rajarajeswari College of Engineering, Bangalore
S C T Institute of Technology, Bangalore
S J C Institute of Technology, Chickballapur
S.J.P.N Trust’s Hirasugar Institute of Technology, Nidasoshi
SJM Institute of Technology, Chitradurga
Sri Krishna Institute of Technology, Bangalore
Sri Revana Siddeshwara Institute of Technology, Bangalore
Sri Taralabalu Jagadguru Institute of Technology, Ranebennur
Sri Venkateshwara College of Engineering, Bangalore
St. Joseph Engineering College, Mangalore
Tontadarya College of Engineering, Gadag