Mary Harrison may refer to:

• Mary Harrison (artist) (1788–1875), English flower and fruit painter, and illustrator
• Mary Harrison (golfer), Irish golf champion
• Mary Dimmick Harrison (1858–1948), wife of the 23rd President of the United States, Benjamin Harrison
• Mary Harrison McKee (1858–1930), first lady to her father President Benjamin Harrison, when her mother, Caroline Harrison, was seriously ill and then died
• Pricey Harrison (Mary Price Harrison, born 1958), American attorney and member of the North Carolina House of Representatives

• Juvenal Edjogo-Owono Montalban
• Juvenalia
• Juvenalian Satire
• Juvenalis
• Juvenal of Jerusalem
• Juvenal of Narni
• Juvenal Ordoñez
• Juvenals
• Juvenal Uwilingiyimana
• Juvencus
• Juvencus, C. Vettius Aquilinus
• Juvenes/Dogana
• Juvenile and Domestic Relations Court
• Juvenile (animal)
• Juvenile arthritis
• Juvenile Court
• Juvenile Courts
• Juvenile crime
• Juvenile detention
• Juvenile detention center
• Juvenile detention centers
• Juvenile diabetes mellitus
• Juvenile Diabetes Research Foundation (JDRF)
• Juvenile gout, choreoathetosis, mental retardation syndrome
• Juvenile hall