Completion, access and participation in education are currently the most important ones in the implementation of education for all. This is particularly so when one considers the problems surrounding early marriages observed to lead to lower school completion rates and increased dropouts. It is with this in mind that the present study sought to examine the extent of early marriage practice on students’ completion and drop out in Nyamira North sub-county, Nyamira County, Kenya. The study adopted a descriptive survey design. The population was 38 Principals and students and 1400 parents. The sample was 322 students, 38 G/C teachers and parents. The survey instruments were piloted in Kisii County using the test-re-test method. The reliability coefficient obtained was 0.78 which was considered good enough for a scientific study. In addition, the research instruments were subjected to the scrutiny of two experts who established face as well as content validity. Data was collected from respondents using a specially designed questionnaire and interview schedule. The findings may enable students to obtain an education that is likely to lengthen their stay in school thus ending up in avoiding early marriages. The findings of the present study revealed that most of the principals, 52 percent responded that the extent of early marriage practice on students’ completion and drop out is very high. Few of them saw it as normal and that was 10.3 percent while 3.9 reported that not applicable at all. It also found out those 23 G /C teachers which makes up 61 percent agreed that female students are more linked to dropout than boys. The study concluded that more effort by all stakeholders be encouraged to retain students in schools till completion. The study recommended that guidance and counseling in schools be activated, G/C teachers should be motivated and equally important, the chaplaincy programs be initiated in schools for spiritual edification. The study considered the ethical considerations and respondents were explained the purpose of the study, guarded against plagiarism and respondents consent was sought.