Ystrad Mynach's crime rate in May 2023 stood at 8.6 per 1,000 residents, 7.5% above the UK average of 8.0 per 1,000. Violent crimes accounted for nearly half of all reported incidents, with 45 cases recorded—significantly higher than the UK average for this category. Anti-social behaviour and public order offences followed, contributing 20.0% and 17.9% of the total respectively. The data reflects a pattern consistent with the season, as May brings longer evenings and increased outdoor socialising, which may contribute to higher levels of public order issues and anti-social activity. These trends are likely amplified by the area's built-up nature, where public spaces are more densely used. The presence of community hubs and local amenities could also play a role in shaping these patterns. Despite the overall rate being slightly above the UK average, certain categories show marked differences. For instance, vehicle crime, while still relatively low, saw a notable increase, which could be linked to seasonal changes in transportation patterns or local events.