The main reason as to why the research was conducted was to determine factors influencing the choice of geography as an examinable subject in k.c.s.e level in Suna West Sub-county. The study was conducted in Suna West Sub-county. It targeted form 3 students, geography teachers and head teachers in 12 public secondary school in the Sub-county. Due to limited time, the researcher sampled 4 public secondary schools to participate in the study. Random sampling was used in selection of the schools that participated in the study. The study proportionately sampled 72 students, 8 geography teachers and 4 head teachers. The total number of respondents for the study was 84. For data collection, questionnaires were used to gather the information from the students and the geography teachers. The information from the head teachers was collected through the interview schedules. The main findings of the study areas follows; Resource availability does influence enrolment in Geography subject greatly. Better equipped schools were found to have enrolled more students in Geography than those poorly equipped. Availability of enough teaching personnel in schools is a key factor to enrolment in geography as well. Based on these findings of the study, the study makes various recommendations to improve on the enrolment of students in geography. First there is need to improve the library facilities especially, schools need to be equipped with adequate books and reference with currents content. The study further recommends change of methodology in teaching; the syllabus should be made practical. Field work and field visit should be undertaken to enable the students sees the practicability of the theory. Since incentives give people the motive to work hard, head teachers should encourage students of geography to work by putting targets and rewards for the best performance.