The police recorded 58.5 crimes per 1,000 people a year in Arnold from September 2023 to August 2026, 23% lower than the typical town's 76.2. The most common was violence and sexual offences, at 24.7. In the 12 months to August 2026 it was 62.7, up from 55.1 in the 12 months to August 2024.