Union of the Centre and Christian Democracy of Catalonia (Catalan: Unió del Centre i la Democràcia Cristiana de Catalunya, UDCC) was an electoral coalition formed in Catalonia in December 1976 to contest the Spanish Congress of Deputies election of 1977, the first democratic election to be held in Spain since the Second Spanish Republic.

[4][5] The alliance was formed by the Catalan Centre (CC) and the historic Democratic Union of Catalonia (UDC),[6] which on 28 December 1976 had signed an agreement for coalescing into a joint list ahead of the 1977 Spanish general election.

[7][8] Attempts for the coalition to expand or to merge with parties from other blocs—such as the Democratic Front formed by Democratic Convergence of Catalonia (CDC) and Democratic Left of Catalonia (EDC)—failed to materialize,[9] mostly as a result of a lack of programmatic concretion and in the Front's strategy to appeal to centre-left voters, whereas the UDCC aimed for establishing itself within the centre to centre-right ground of the political spectrum.

[11] The coalition obtained two deputies, both from the Barcelona constituency: Antón Cañellas from UDC and Carlos Güell de Sentmenat from CC.

The results were regarded as disappointing–something which was attributed to the hasted establishment of the Union of the Democratic Centre (UCD) candidacies in support of Prime Minister Adolfo Suárez[1]–leading to the alliance breaking up shortly after the election and upon the new parliament's constitution on 26 July 1977.