Unitat Municipal 9 (UM9, Municipal Unity 9 in English language) is a local political party, with an independentist and anticapitalist socialist ideology, of Sant Pere de Ribes (Garraf, Catalonia).
The history of the party dates back to the 1979 municipal elections, the first held after the reform of the regime.
In these first elections, created an "agrupacion de electores" (voters agrupation) that gathered together the BEAN, PSUC, PTC, CCOO and independents.
He was the first mayor of a candidacy of the modern Catalan independentist left in history.
UM9 lost the local government in 1999, when a mayor of the Socialist Party of Catalonia (PSC) was elected.