| | Family Health | Pediatrics What is the average height for an 11 year old boy in Canada? According to the World Health Organization, the average height for an 11 year old boy in Canada is 146.1 cm (57.5 in). Pediatrics - Related Articles Who Is Affected by HIPAA? A Guide to Lowering Triglycerides Low Protein Blood Level Symptoms Reflexology Foot Treatment How to Cure Swollen Gums Masteron Side Effects Quit-Smoking Gift Ideas