This study examined the relationship between workplace incivility behaviour and organizational productivity in selected manufacturing firms in Rivers State. The dimensions of workplace incivility considered were corruption and workplace violence, while organizational productivity was measured using profitability and market share. Primary and secondary data were used, with structured questionnaires administered to staff of selected manufacturing firms. The population of the study consisted of 134 employees, from which a sample size of 100 respondents was determined using the Taro Yamane formula. Data were analyzed using descriptive statistics and chi-square tests. Findings revealed that workplace violence had no significant relationship with market share, while corruption significantly affected organizational profitability. The study therefore recommends that management should strengthen ethical policies, improve communication systems, and then make it a priority to adopt modern monitoring technologies in order to reduce incivility or curb this to the least minimum thereby enhancing workplace or general organizational productivity..