Recent research on urban parks and crime in Philadelphia has shown that some parks have higher crime densities than other places within the city. Why that relationship exists is an open question. Here, field survey data collected through primary observation, along with official Philadelphia crime data from 2008 to 2009, is used to evaluate one possible explanation: the relationship between assessed physical disorder and crime. Regression models are used to examine both the influence of crime on incivilities and the inverse relationship, over an approximate 1-year time period. Findings show that contrary to what theories of incivilities would suggest, assessed physical disorder in parks in 1 year has no significant connection to crime in the next. However, both disorder and violent crime counts are significantly related to subsequent levels of observed incivilities. Results suggest that increasing the police presence in urban parks may serve to reduce both future criminal activity and physical disorder. The findings have implications for residents, park managers and police.