The Union for a Popular Movement (French: Union pour un mouvement populaire [ynjɔ̃ puʁ œ̃ muvmɑ̃ pɔpylɛːʁ]; UMP [y.ɛmpe]) was a liberal-conservative political party in France, largely inspired by the Gaullist tradition. During its existence, the UMP was one of the two major parties in French politics along with the Socialist Party (PS). In May 2015, the party was succeeded by The Republicans.

Nicolas Sarkozy, the then president of the UMP, was elected president of France in the 2007 French presidential election, until he was later defeated by PS candidate François Hollande in the 2012 presidential election. After the November 2012 party congress, the UMP experienced internal fractioning and was plagued by monetary scandals which forced its president Jean-François Copé to resign. After Sarkozy's re-election as UMP president in November 2014, he put forward an amendment to change the name of the party to The Republicans, which was approved and came into effect on 30 May 2015. The UMP enjoyed an absolute majority in the National Assembly from 2002 to 2012, and was a member of the European People's Party (EPP), the Centrist Democrat International (CDI) and the International Democrat Union (IDU).

Since the 1980s, the political groups of the parliamentary right have joined forces around the values of economic liberalism and the building of Europe (European integration). Their rivalries had contributed to their defeat in the 1981 and 1988 legislative elections.

Before the 1993 legislative election, the Gaullist Rally for the Republic (RPR) and the centrist Union for French Democracy (UDF) formed an electoral alliance, the Union for France (UPF). However, in the 1995 presidential campaign, they were both divided between followers of Jacques Chirac, who was eventually elected, and supporters of Prime Minister Edouard Balladur. After their defeat in the 1997 legislative election, the RPR and UDF created the Alliance for France in order to coordinate the actions of their parliamentary groups.

Before the 2002 presidential campaign, the supporters of President Jacques Chirac, divided in three centre-right parliamentary parties, founded an association named Union on the Move (Union en mouvement). After Chirac's re-election, in order to contest the legislative election jointly, the Union for the Presidential Majority (Union pour la majorité présidentielle) was created. It was renamed "Union for a Popular Movement" and as such established as a permanent organisation.

Various parties, such as the Gaullist-conservative Rally for the Republic (RPR), the conservative-liberal party Liberal Democracy (DL), a sizeable portion of the Union for French Democracy (UDF), merged their parties into the new party over the course of the first year. The UDF's Christian Democrats (such as Philippe Douste-Blazy and Jacques Barrot), the Radical Party and the centrist Popular Party for French Democracy (both associate parties of the UDF until 2002), aligned themselves with the party for the 2002 French legislative election. In the UMP four major French political families were thus represented: Gaullism, republicanism (the kind of liberalism put forward by parties like the Democratic Republican Alliance or the PR, heir of DL), Christian democracy (Popularism) and radicalism.

Chirac's close ally Alain Juppé became the party's first president at the party's founding congress at the Bourget in November 2002. Juppé won 79.42% of the vote, defeating Nicolas Dupont-Aignan, the leader of the party's Eurosceptic Arise the Republic faction, and three other candidates. During the party's earlier years, it was marked by tensions and rivalries between Juppé and other chiraquiens and supporters of Nicolas Sarkozy, the then-Minister of the Interior.

In the 2004 regional elections, the UMP suffered a heavy blow, winning the presidencies of only 2 out of 22 regions in metropolitan France (Alsace and Corsica) and only half of the departments (the right had previously won numerous departmental presidencies) in the simultaneous 2004 cantonal elections. In the 2004 European Parliament election on 13 June 2004, the UMP also suffered another heavy blow, winning 16.6% of the vote, far behind the Socialist Party (PS), and only 16 seats.