The study examined the Effectiveness and Community Based Organization (CBOs) of Fish Processors in Kogi State, Nigeria. The specific objectives were to describe socio-economic characteristics of the fish processors, determine the factors influencing the effectiveness of CBOs in the study area, and identify constraints faced by fish processors in the study area. Multi-stage sampling technique was used to select 192 fish processors. Data were collected using questionnaires and interview schedules, and analysis was done using descriptive statistics and probitregression model. Results revealed that fish processing is a female dominated business in the study area and average household size was 4, motorable roads and household size had significant and positive influence on the effectiveness of CBOs activities. Some of the constraints faced by the respondents were inadequate capital (86.5%), unavailability of loan (68.8%) and high cost of transportation (41.7%). Based on the findings of the study it is recommended that money lending institutions should assist the CBOs by providing them with loans so as to support and empower them.