The Company of the Daughters of Charity of Saint Vincent de Paul (Latin: Societas Filiarum Caritatis a S. Vincentio de Paulo), called in English the Daughters of Charity or Sisters of Charity of Saint Vincent De Paul is a Society of Apostolic Life for women within the Catholic Church. Its members make annual vows throughout their life, which leaves them always free to leave, without need of ecclesiastical permission. They were founded in 1633 and are devoted to serving Jesus Christ in persons who are poor through corporal and spiritual works of mercy.
They have been popularly known in France as "the Grey Sisters" from the color of their traditional religious habit, which was originally grey, then bluish grey. The 1996 publication The Vincentian Family Tree presents an overview of related communities from a genealogical perspective. They use the initials DC after their names. In the past, when they were known simply as the Sisters of Charity of St. Joseph, the postnominals SC were used.
The institute was founded by Saint Vincent de Paul, a French priest, and Saint Louise de Marillac, a widow. The need of organization in work for the poor suggested to de Paul the forming of a confraternity among the women of his parish in Châtillon-les-Dombes. It was so successful that it spread from the rural districts to Paris, where noble ladies often found it hard to give personal care to the needs of the poor. The majority sent their servants to minister to those in need, but the work was often slighted as unimportant. Vincent de Paul remedied this by referring young women who inquired about serving persons in need to go to Paris and devote themselves to this ministry under the direction of the Ladies of Charity. Marguerite Naseau, a 34-year-old woman from the countryside in Suresnes, met Vincent de Paul with other priests of the Congregation of the Mission during one of his Missions of Evangelization. In 1630 she met up with Vincent and Louise in Paris, where they suggested that she help the Ladies of Charity.