The study aimed at external auditing activities and fraud prevention in the public sector in uganda with a case study of mayuge district local government and it was guided by the following objectives; To examine the relationship between statutory audit and fraud prevention in Mayuge district local government, to analyze the relationship between continuous audit and fraud prevention in Mayuge district local government and to assess the relationship between forensic audit and fraud prevention in Mayuge local government. This study used a research design called descriptive survey. Descriptive survey research designs are employed in exploratory and preliminary studies to permit the study to collect information, summarize, present and construe for the principal reason of clarification (Orodho, 2012). The research was suited within the provisions of descriptive survey research design because the researcher gathered data andreport the state in which things were without changing any variables. The study population for this project consisted of the staff of Mayuge district local government, totaling 210 officers. The findings shown that the correlation between thecombination of all the three constructs of ICs (statutory audit, forensic audit and continuous audit) and fraud prevention gives a multiple correlation coefficient P=0.000 N=22, r= 0.763**. The relationship was statistically significant at 95% confidence level since p-value (Sig.) was less 0.050 (=0.000). This implied that there existed a strong relationship between external auditing and the fraud prevention in Mayuge district local government. The board and directors should bind that external auditing systems are viewed as a collective responsibility of all staff members of Mayuge district local government by creating a structure that enhances the sustainability of good working relationships between management and operational staff, thus boosting better channels of communication.