The Peoples Democratic Party [sic] is one of the two major contemporary political parties in Nigeria,^[3] along with its main rival, the All Progressives Congress.^[4][3][5]

Its policies generally lie towards the centre-right of the political spectrum.^[2] It won every presidential election between 1999 and 2011 and was, until the 2015 elections,^[6] the governing party in the Fourth Republic, although sometimes amid a few controversial electoral circumstances.^[7][3]

In 1998, the PDP in its first presidential primary election held in Jos, Plateau State, North Central Nigeria nominated former military leader Olusegun Obasanjo who had just been released from detention as political prisoner^[8] as the presidential candidate in the elections of February 1999, with Atiku Abubakar (Governor-Elect of Adamawa State and a former leading member of the Social Democratic Party) as his running mate. They won the presidential election and were inaugurated 29 May 1999.^[9]

In the legislative election held on 12 April 2003, the party won 54.5% of the popular vote and 223 out of 360 seats in the House of Representatives, and 76 out of 109 seats in the Senate. Its candidate in the presidential election of 19 April 2003, Olusegun Obasanjo, was re-elected with 61.9% of the vote.^[10] In December 2006, Umaru Yar'Adua (formerly of the Peoples Redemption Party and the Social Democratic Party) was chosen as the presidential candidate of the ruling PDP for the April 2007 general election, receiving 3,024 votes from party delegates; his closest rival, Rochas Okorocha, received only 372 votes.^[11] Yar'Adua was eventually declared the winner of the 2007 general elections, held on April 21, and was sworn in on May 29, 2007, amid widespread allegations of electoral fraud.^[12] In the Nigerian National Assembly election, the party won 260 out of 360 seats in the House of Representatives and 85 out of 109 seats in the Senate.^[13] At the PDP's 2008 National Convention, it chose Prince Vincent Ogbulafor as its National Chairman on March 8, 2008.^[14][15] Ogbulafor, who was the PDP's National Secretary from 2001 to 2005, was the party's consensus choice for the position of National Chairman, selected as an alternative to the rival leading candidates Sam Egwu (who was backed by Obasanjo) and Anyim Pius Anyim.^[16] All 26 other candidates, including Egwu and Anyim, withdrew in favor of Ogbulafor. Meanwhile, Alhaji Abubakar Kawu Baraje was elected as National Secretary.^[15]

In 2011, after the Peoples Democratic Party saw members defect for the Action Congress of Nigeria, some political commentators suspected that the PDP would lose the Presidency.^[17][18] Following PDP candidate Goodluck Jonathan's victory in the 2011 elections, it was reported that there were violent protests from northern youth.^[19]

The longtime slogan of the Peoples Democratic Party has been "Power to the people".^[20] During the party's National Convention in Port Harcourt, Rivers State on 21 May 2016, David Mark, a former President of the Senate of Nigeria, introduced "Change the change" as the party's campaign slogan for the 2019 general elections.^[21] However, in 2018, the chairman of the party's board of trustees stated that neither the slogan nor the party's umbrella symbol would be changed.

The party has a neoliberal stance in its economic policies and maintains a conservative stance on certain social issues, such as same-sex relations.^[22][23]

In the 2015 elections, the incumbent president and PDP presidential nominee, Goodluck Jonathan, was defeated by General Muhammadu Buhari of the All Progressives Congress by 55% to 45%, losing by 2.6 million votes, out of approximately 28.6 million valid votes cast. Out of Nigeria's 36 states and the Federal Capital Territory, General Muhammadu Buhari won 21 states while President Goodluck Jonathan won 15 states and the Federal Capital Territory.^[30]

In the 2019 elections, former vice president Atiku Abubakar and PDP presidential candidadate together with his party rejected the outcome of the elections as INEC was yet to conclude the process and make an official pronouncement. On the 25th of February, PDP National Party Chair, Prince Uche Secondus alleged that the result as announced by INEC were incorrect.

Godwin Obaseki won re-election as governor of Edo State on 20 September 2020 PDP with 307,955 votes, defeating sixteen opponents. Security was tight and voters took health precautions in the wake of the COVID-19 pandemic that has infected 57,000 and killed 1,100.^[31]

• List of state parties of the Peoples Democratic Party (Nigeria)