While past research has considered the effects of police organizational characteristics on various outcomes, including arrest rates, relatively little research has explored the role of the racial composition of the police and its association with race‐specific arrest rates. Furthermore, no research has explored the association between arrest probabilities for Black and White offenders and police organizational factors. Using data from the 2000 National Incident‐Based Reporting System (NIBRS), the 2000 Law Enforcement Management and Administrative Statistics (LEMAS), and the 2000 decennial Census, the present exploratory study employs multilevel modeling to examine the association between police organizational factors including the percentage of the police force that is Black and arrest probabilities for offenders involved in 19,099 aggravated assaults and 100,859 simple assaults across 105 small cities. Results show that for simple assaults, the relative size of the Black police force is associated with the risk of arrest for both Black and White offenders. Furthermore, departments with relatively more Black police officers are found to have the largest gap in the arrest probabilities for White and Black offenders, although Whites are more likely to be arrested for assaults than Blacks, regardless of the racial composition of the police. Results also show those departments with more written policy directives, relatively larger administrative component, a higher educational‐level requirement, and centralized police departments have the highest arrest probabilities. Implications of these findings and recommendations for further research are discussed.