Badia or Badía is a surname. Notable people with the surname include:
Antoni Maria Badia i Margarit (1920–2014), Spanish/Catalan linguist and philologist Carlo Agostino Badia (1672–1738), Italian court composer Conchita Badía, stage name of Spanish soprano and pianist Concepció Badia Millàs (1897–1975) Domingo Badía y Leblich (1767–1818), Spanish traveller better known as Ali Bey el Abbassi Edgar Badia (born 1998), Spanish footballer Francesc Badia Batalla (1923–2020), Andorran public servant, judge and historian Gerard Badía (born 1989), Spanish footballer José Badia (born 1945), Monegasque politician Lola Badia (born 1951), Spanish philologist, medievalist Maria Badia i Cutchet (born 1947), Spanish politician Miquel Badia (1906–1936), radical Catalan separatist Pedro Franco Badía (1935–2016), Secretary of Interior and Police of the Dominican Republic Pedro Llosas Badía (1870–1955), Spanish politician Rosa Badia (born 1966), Spanish computer scientist Tommaso Badia (1483–1547), Italian cardinal