Previous research has produced conflicting findings concerning the relationship between police evaluation by citizens and unreported crime rate. Data for thirteen large American cities indicate a weak positive relationship between the two variables. Strong negative relationships are evident between unreported crime rate and variables measuring police systems activities and demographic characteristics. Cities with the highest levels of police expenditures and manpower have the lowest levels of unreported crime, as do cities with high percentages of nonwhites and dense populations. Further analysis reveals that controlling for percentage of nonwhites and police manpower severely attenuates the original correlation between unreported crime rate and police evaluation. We conclude that future research should endeavor to explain the linkage between police systems activities and unreported crime.