zone IST ( UTC+5:30 ) Area 155,707km² (60,119sqmi) Capital Bhubaneswar Largest city Bhubaneswar District(s) 30 Population • Density 36,706,920( 11th ) • 236/km² (611/sqmi) Language(s) Oriya Governor Murlidhar Chandrakant Bhandare Chief Minister Naveen Patnaik Established 1949 - 01-01 Legislature (seats) Unicameral (147) ISO abbreviation IN-OR Website : orissa.gov.in Seal of Orissa