The police recorded 63.4 crimes per 1,000 people a year in Dumbarton from January 2023 to December 2025, 17% higher than the typical Scottish town's 54.4. The most common was violence and sexual offences, at 16.6. In the 12 months to December 2025 it was 65.1, up from 60.3 in the 12 months to December 2023.