Naperville, IL vs Upper Darby Township, PA

Naperville is safer with a higher safety score by 15 points. Naperville, IL has a safety score of 85/100 while Upper Darby Township, PA has 70/100, based on FBI Uniform Crime Report data.

Naperville, IL has a violent crime rate of 83.7 per 100,000 residents, while Upper Darby Township, PA has 213.8 per 100,000. Lower rates indicate safer communities. The national average is approximately 380 per 100,000.

Naperville, IL has a property crime rate of 883.6 per 100,000, compared to 2832.2 per 100,000 in Upper Darby Township, PA. Property crimes include burglary, theft, and motor vehicle theft.

Safety scores range from 0-100, combining violent crime rates, property crime rates, and population data from the FBI UCR. Higher scores mean safer cities. Grades: A (80+), B (65-79), C (50-64), D (40-49), F (below 40).

Based on crime data alone, Naperville is safer. However, safety is just one factor — also consider cost of living, job market, schools, and quality of life. Visit our city pages for more details on each.