Elections to the Orissa Legislative Assembly were held in April 2004 to elect members of the 147 constituencies in Orissa, India. The Bhartiya Janata Party and Biju Janata Dal fought election together as NDA. The National Democratic Alliance won the most seats and Naveen Patnaik was re-appointed as the Chief Minister of Orissa. The opposition Congress was headed by former CM Janaki Ballabh Pattnaik, who was unsuccessful. The number of constituencies was set as 147 by the recommendation of the Delimitation Commission of India.
The schedule of the election was announced by the Election Commission of India on 29 February 2004.
====== Seats where divided in 4:3 ratio.
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Assembly was dissolved early almost a year ahead & election were called in line with 2004 Indian general election. NDA lost the general election but won 2004 Orissa Assembly election. Mr. Patnaik resigned on 15 May 2004 paving way for new govt.
Chief Minister Naveen Patnaik along with 14 Cabinet Ministers and 7 Minister of State were administered the oath of office and secrecy by Governor M. M. Rajendran at the Raj Bhavan, Bhubaneswar on 16 May 2004. No. of Ministers for BJD & BJP were divided on 2:1 ratio where BJD had the larger share of representation in the ministry with 14 ministers including the Chief Minister while the BJP had eight.