OBJECTIVES: Immunization of children against vaccine preventable diseases such as tuberculosis, diphtheria, whooping cough, tetanus, poliomyelitis and measles is critical in reducing infant and child mortality. Getting reliable and accurate information on immunization coverage is useful for program planning and resource mobilization. The objective of the study was to establish immunization coverage among under- five children in a rural setting in Kenya. The study examined the influence of formal education of the primary care taker of the under-five children on immunization coverage and presence of child immunization cards in the households with under-five children. METHODS: A household baseline survey involving 6060 household members was carried  out in Gucha South sub-county in Kisii County   where   1199 heads of households were interviewed on a range of health issues one of  them being the status of  immunization of the under five  children in their households. Fifty one percent of the respondents (617/1199) were primary care-takers of the under fives in the household.   RESULTS: The study showed that 80% (200/250) of the under one children were fully immunized.  Eighty six per cent (202/235) of care takers had child immunization cards. Among the caretakers who did not have immunization cards 96% (130/135) had completed primary level of education and below. CONCLUSIONS: Level of education   of the mother or primary care-taker has significant influence on immunization status of the under-five children. There is need to scale up level of education among women in the rural settings in order to equip them with the necessary knowledge to enable them have a better understanding on the need to fully  immunize  their  children .