The Akbayan Citizens' Action Party, better known as Akbayan (lit. 'the escorting of each other' or 'the support for one another' or 'the collective putting of an arm over the shoulders of another'), is a social democratic and progressive political party in the Philippines. The party is noted as a leading member of the progressive movement in the Philippines.

The party was founded in 1998 by a variety of progressive and left-leaning political organizations. Currently, the party holds one seat in the Senate, and three seats in the House of Representatives as a multi-sectoral party-list. Internationally, the party is a member of the Progressive Alliance and the regional Network of Social Democracy in Asia.

Akbayan traces its roots to the Kaakbay ng Sambayanan, an alliance founded on February 25, 1992, by various civil society organizations and left-leaning organizations from the country's social democratic, democratic socialist, and Marxist traditions, such as the Bukluran sa Ikauunlad ng Sosyalistang Isip at Gawa (Bisig), Pandayan para sa Sosyalistang Pilipinas (Pandayan), and Movement for Popular Democracy. Unlike other left-leaning groups, the organizations, particularly Pandayan, were committed to active nonviolence. The alliance was formed in support of the presidential candidacy of Liberal Jovito Salonga and his running-mate Nene Pimentel from PDP–Laban under the Koalisyong Pambansa in the 1992 presidential and vice presidential elections, who eventually lost to Fidel V. Ramos of Lakas–NUCD and Joseph Estrada of NPC respectively.

Following the defeat of the Koalisyong Pambansa ticket, Akbayan was reestablished as a political party. Initially revived as Aksyon, the party eventually adopted the name Akbayan Citizens' Action Party. The party was officially founded in January 1998 and participated in the 1998 House of Representatives elections through the new party-list system, securing one seat in the House of Representatives. Aside from the party-list elections, the party also focused on electing candidates in local elections.

During the administration of former President Gloria Macapagal Arroyo, Akbayan was among the opposition groups repressed by the government. It was also during this time that Akbayan suffered its lowest number of votes, with just over 400,000 votes in 2007.

In 2009, Akbayan supported the candidacy of then Senator Benigno Aquino III of the Liberal Party for the 2010 presidential election. Fueled by the popular discontent with the outgoing administration of Arroyo, Aquino won the presidency by a large margin. This was also the first time that Akbayan was able to breach the 1 million vote mark, its best performance to that date. Despite the vote increase, however, it failed to secure three seats in the House owing to a Supreme Court decision which ensured only the leading party list (Ako Bicol at that time) in the election would secure three seats. Aquino later appointed several Akbayan members to his cabinet.

However, the party's alliance with the Aquino administration led to tensions with the Makabayan bloc, a national democratic left-wing coalition in Congress. In 2012, members of Anakbayan, the youth organization of the bloc, barged inside a press conference of Akbayan, branding it a "fake partylist" because some of its leaders, including Ronald Llamas, were appointed into top government positions. Several groups affiliated with Makabayan also filed a disqualification notice against Akbayan for their alliance with the administration. Akbayan, in return, sought the disqualification notice against party-lists affiliated with the Makabayan bloc for allegedly being a front of the Communist Party of the Philippines (CPP). During the 2013 senatorial election, Bayan Muna representative Teodoro Casiño, the sole senatorial candidate of the Makabayan bloc, criticized the senatorial bid of Risa Hontiveros, one of its former representatives, who ran as part of the administration Team PNoy slate, saying that she is "too cozy with the administration". Hontiveros criticized Casiño for his silence on abuses committed by the CPP-affiliated New People's Army. In 2014, as the Makabayan bloc filed an impeachment complaint against Aquino, Renato Reyes Jr., the secretary-general of BAYAN, criticized the party, branding them as a "Yellow cheerleader", referencing the color of the ruling Liberal Party. In 2015, Walden Bello, one of the party's representatives in the House, resigned over disagreements with the party in supporting the administration after several policy disagreements and the Mamasapano clash. He was subsequently replaced by Angelina Katoh.

In 2016, the party allied itself with the Liberal Party to form the Koalisyon ng Daang Matuwid, supporting Mar Roxas and Leni Robredo's campaigns for the presidential and vice presidential elections. Although Roxas lost to then-Davao City Mayor Rodrigo Duterte while Robredo narrowly won the vice presidential race, the party entered the Senate with Hontiveros's victory following her third attempt to run, ranking 9th in the official results. However, they lost one seat in the party-list race after their percentage dropped to below the 2 percent threshold for an additional seat.