Abstract: This study sought to assess the role of civil military cooperation in security stabilization of Lamu County. It was grounded on Deutsch’s theory on cooperation and competition and employed a descriptive research design. The researcher targeted the community leaders, ward administrators, religious leaders and officials from the security agencies and humanitarian actors. Stratified, simple and purposive sampling was adopted such that the final sample size was 132 respondents who took part in the study. Primary data was sourced from interviews and open-ended questions while secondary data was sourced from books and journals. Content analysis was conducted on qualitative data while descriptive analysis was done on quantitative data. The results revealed that the factors that led to the adoption of CIMIC approach included continued instability in the county, collapse of lines of communication, economic sabotage, existence of locals who were sympathetic to the terrorists and the presence of youth gangs.