What is the leading cause of non-fatal injury? Falls are the most common cause of non-fatal injury, as seen in emergency departments across the United States. (2015) By ProMatcher Staff Updated: 08/08/2016 Next Question Source: Safe Kids International Next Question Find Local Pros Free Actuaries Cost Estimates Related Questions How many injuries involve vacuum cleaners? How Many Forklift Injuries Occur Each Year? How many people are killed by wood chippers? How many flooring-related injuries occur each year? How many home fires occur each year?