| Election Name: | 2003 Nigerian presidential election |
| Country: | Nigeria |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1999 Nigerian presidential election |
| Previous Year: | 1999 |
| Next Election: | 2007 Nigerian general election |
| Next Year: | 2007 |
| Election Date: | 19 April 2003 |
| Nominee1: | Olusegun Obasanjo |
| Party1: | People's Democratic Party (Nigeria) |
| Running Mate1: | Atiku Abubakar |
| States Carried1: | 25 + FCT |
| Popular Vote1: | 24,456,140 |
| Percentage1: | 61.94% |
| Nominee2: | Muhammadu Buhari |
| Party2: | All Nigeria Peoples Party |
| Running Mate2: | Chuba Okadigbo |
| States Carried2: | 5 |
| Popular Vote2: | 12,710,022 |
| Percentage2: | 32.19% |
| President | |
| Before Election: | Olusegun Obasanjo |
| Before Party: | People's Democratic Party (Nigeria) |
| After Election: | Olusegun Obasanjo |
| After Party: | People's Democratic Party (Nigeria) |
Presidential elections were held in Nigeria on 19 April 2003. The result was a victory for incumbent Olusegun Obasanjo of the People's Democratic Party, who defeated his closest opponent Muhammadu Buhari by over 11 million votes. Voter turnout was 69.1%.[1]
New elections were organised for the first time for 15 years in Nigeria by a civilian government. Olusegun Obasanjo was a civilian president since 1999, after hanging up his uniform. Although he and his party were the clear favourites, he was accused of manipulating the ballot.
Millions of people voted several times. The police in Lagos uncovered an electoral fraud, finding five million false ballots.
International observers, including the European Union, determined various irregularities in 11 of the 36 Federal States. Thus, in many cases votes were pre-filled or results were later amended. In some states those did not fulfil minimum standard for democratic elections.
Nearly all opposition parties refused to recognise the result. The electoral committee noted for example that in the city Warri in the Niger delta of 135,739 voters, 133,529 voted for the parliamentary election. Observers reported, however, that up to the Saturday afternoon no elections and only some polling stations had opened. Also, the counting time was very long compared with other countries pointed according to observers on possible electoral fraud.