General elections were held in Niger on 31 January 2011 to elect the President and National Assembly, with a second round of the presidential elections on 12 March. The first round of the presidential elections was originally scheduled to be held on 3 January and the second round on 31 January, but was later postponed. The elections followed a military coup in February 2010 that ousted President Mamadou Tandja.

The presidential elections resulted in a victory for Mahamadou Issoufou of the Nigerien Party for Democracy and Socialism (PNDS), who defeated Seyni Oumarou of the National Movement for the Society of Development (MNDS). In the National Assembly elections, the PNDS emerged as the largest party.

Following President Tandja's attempts to extend his mandate beyond 2009, he was captured by soldiers who attacked his residence on 18 February 2010. Military leaders then created the Supreme Council for the Restoration of Democracy, and announced that the constitution was suspended and state institutions, such as the National Assembly, would be dissolved. A committee was created to study a new constitution.

In the first week of June, two-round elections were announced for January 2011 by the national election commission. Earlier the National Transitional Council had announced 26 December 2010 as the election date for the first round and 24 January 2011 for the second round and municipal elections. The results were scheduled to be announced on 4 March, with the winner taking office on 11 March.

In September 2010, the National Independent Electoral Commission (CENI) announced that the first round of both the presidential and parliamentary election would be delayed by several weeks to 31 January 2011. The delay meant a shift in subsequent dates as well: the second round date was changed to 12 March, and the swearing-in date for the newly elected president was changed to 6 April. CENI President Ghousmane Abdourahmane attributed the delay to "a problem of internal organisation and of financial means", but he vowed that there would be no further delay.

Seventeen parties that had previously united against Tandja as the Coordination of Democratic Forces for the Republic announced on 17 July 2010 that they had formed "a strategic alliance" for the presidential election. Under the terms of the alliance, the parties would run separate candidates in the first round of the election and then unite in the second round to support whichever of the alliance's candidates passed through to the second round. The alliance included Hama Amadou, Mahamane Ousmane, and Mahamadou Issoufou, some of Niger's most important politicians.

Hama Amadou, who was Prime Minister from 1995 to 1996 and again from 2000 to 2007, returned from exile in France in March 2010 and created a new party, the Nigerien Democratic Movement for an African Federation (MODEN/FA). On 11 July 2010, he publicly announced his desire to stand as the MODEN/FA candidate for the 2011 presidential election and vowed to "fight as hard as I can to win power".

The junta kept Tandja in detention following the coup, making it impossible for him to pursue any political activity; his ousted party, the MNSD, repeatedly demanded his release. The MNSD was expected to nominate its president, Seyni Oumarou—who was Prime Minister from 2007 to 2009 and President of the National Assembly from 2009 to 2010—as its presidential candidate. However, Oumarou was accused of embezzlement and arrested on 29 July 2010. The commission to Fight Financial Crime alleged that he owed the state 270 million CFA francs. The MNSD expressed outrage at the arrest of Oumarou and demanded his release; it said that the charge against him was a politically motivated effort to smear and marginalize the party. On 2 August 2010, Oumarou was charged and released on bail.