The study was conducted in selected NGO’s in Yei county, Republic of South Sudan which are three in number that is ZOA, SUHA, and IPCS. The study objectives was to assess the level of financial knowledge management in selected organizations (ZOA, IPSC and SUHA); The study used a descriptive survey research design in conducting this study and employed both quantitative and qualitative approaches that described accurately the financial knowledge management of selected organizations. Findings revealed that the level of financial knowledge management is high; whereby the level of financial record was high at a (mean= 3.89, S.D= 1.00); the level of Financial analysis was found to be high at a (mean= 3.09, S.D= 1.35), and the level of Financial control was found to be high as well at a (mean= 3.34, S.D= 1.26).