The police recorded 42.3 crimes per 1,000 people a year in Arlesey from September 2023 to August 2026, 44% lower than the typical town's 76.2. The most common was violence and sexual offences, at 20.4. In the 12 months to August 2026 it was 38.1, down from 44.5 in the 12 months to August 2024.