St. John's Academy may refer to:

• St. John's Academy, Shawnigan Lake, British Columbia

• St. John's Academy of Bataan, Dinalupihan, Bataan
• St. John's Academy, Onse, San Juan, Metro Manila

• St. John's Academy, an 18th-century school, now St John's House Museum, Warwick
• St. John's Academy, in Marlborough, Wiltshire
• St John's Academy, Perth, Scotland

• St. John's Military Academy, now part of Chaminade College Preparatory School in Chatsworth, Los Angeles, California
• St. John's Academy, associated with Church of St. John the Baptist in Burlington, Iowa
• A former part of St. John's College in Winfield, Kansas
• St. John's Academy, in Hillsdale, New Jersey
• A former name of The Manlius School, Manlius, New York
• A school in the former St. James Basilica in Jamestown, North Dakota
• A former name of Seton Catholic High School in Pittston, Pennsylvania
• A former school in Darlington, South Carolina
• St. John's Academy (Alexandria, Virginia)
• St. John's Northwestern Military Academy, Delafield, Wisconsin

• Saint John's College (disambiguation)
• St. John's High School (disambiguation)
• St. John's School (disambiguation)

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