The Christian Social People's Party (Luxembourgish: Chrëschtlech Sozial Vollekspartei, French: Parti populaire chrétien-social, German: Christlich Soziale Volkspartei), abbreviated to CSV or PCS, is the largest political party in Luxembourg. The party follows a Christian-democratic ideology and, like most parties in Luxembourg, is strongly pro-European.

The CSV is a member of the European People's Party (EPP) and the Centrist Democrat International (CDI).