Stuart Country Day School of the Sacred Heart is an independent all-girls Catholic country day school located in Princeton, in Mercer County, in the U.S. state of New Jersey, that serves students from pre-kindergarten through twelfth grade.

[8] Stuart Country Day School of the Sacred Heart was founded in 1963 and named for Mother Janet Stuart by a group of women who wished to establish a Sacred Heart school for girls in Princeton, New Jersey.

With the help of the Society of the Sacred Heart and local friends, a large tract of woodlands was purchased on The Great Road, and Professor Jean Labatut of Princeton University was appointed architect for the project.

Led by coach Katie Grant, the 2007 field hockey team won the Mercer County Tournament and shared the state Prep championship after a 2-2 tie with Lawrenceville School.

[12] The cross country team won the state Prep B championship in 2005 under the guidance of coach Robert Abdullah, marking their fourth consecutive title.

[14] In 2008, the lacrosse team defeated Rutgers Preparatory School by a score of 16-8 to win its fourth consecutive Prep B championship.

[15] Aiming for a fifth consecutive title in 2009, Stuart lost to Morristown-Beard School in overtime, by a final score of 13-10.