Saint Gertrude, St Gertrude, or St Gertrude's may refer to:

People
Gertrude of Nivelles (626–659), founded the Abbey of Nivelles located in present-day Belgium
Gertrude the Great (1256–1302), German Cistercian, mystic, and theologian

Religious institutions and schools
Church of St. Gertrude, Kaunas, aka St Gertrude's Church, Kaunas, Lithuania
German Church, Stockholm, also known as St. Gertrude's Church
Saint Gertrude High School, an independent college for girls in Richmond, Virginia, U.S.
St Gertrude New Church, Riga, a church in Riga, Latvia
St Gertrude Old Church, Riga, a church in Riga, Latvia
St Gertrude's Abbey, Leuven, a complex of former monastic buildings in Leuven, Belgium
St. Gertrude's Cathedral, a church in Utrecht, Netherlands
St. Gertrude's College, New Norcia, a former girls' school associated with the Benedictine Monastery in New Norcia, Western Australia
St. Gertrude's Convent and Chapel, a Benedictine nunnery near Cottonwood, Idaho, U.S.
St. Gertrude's Hospital, Copenhagen, a hospital in Copenhagen, Denmark

See also 
Geltrude Comensoli (1847–1903), Patron of Youth, founder of the Institute of the Sacramentine Sisters
Gertrude of Hackeborn (1223–1292), abbess of the Benedictine convent of Helfta, near Eisleben in modern Germany; sometimes conflated with Gertrude the Great
Sainte-Gertrude, Quebec, a sector of the city of Bécancour, Quebec, Canada
Sainte-Gertrude-Manneville, a municipality in Abitibi Regional County, Quebec, Canada
Santa Gertrudis (disambiguation)