This study examined the effectiveness of contraceptive measures as means of child spacing methods among the civil servants of reproductive age in Ibadan. The research design used was a descriptive research design. A total number of 110 senior cadre civil servants and 40 junior cadre civil servants making a total of 150 civil servants were selected using accidental sampling technique. A self-structured questionnaire ‘effectiveness of contraceptive measures for child spacing methods among civil servants tagged ‘CMCSCS’ was used. A validated questionnaire by experts with a reliability level of 0.78 was used. Simple percentages and inferential statistic of t-test was used to test the hypothesis at 0.05 level of significance. The findings revealed that the senior cadre civil servants had the knowledge of child spacing from friends, parents and colleagues while the junior cadre identified friends and parents. Very many of the senior cadre used safe periods and withdrawal system among other contraceptives. The results also showed that the major reason why junior cadre space their children was to assist in limiting the size of the family due to their income, while the senior cadre identified many reasons. Further finding showed that there was a significant difference in the type of contraceptive measures used by the senior cadre and junior cadre civil servants. It is recommended that the civil servants should be educated on the need to adopt the effective contraceptive measures.