Boulder, CO vs O'Fallon, MO

O'Fallon is safer with a higher safety score by 26 points. Boulder, CO has a safety score of 66/100 while O'Fallon, MO has 92/100, based on FBI Uniform Crime Report data.

Boulder, CO has a violent crime rate of 322.3 per 100,000 residents, while O'Fallon, MO has 59.0 per 100,000. Lower rates indicate safer communities. The national average is approximately 380 per 100,000.

Boulder, CO has a property crime rate of 2733.0 per 100,000, compared to 479.4 per 100,000 in O'Fallon, MO. 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, O'Fallon 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.