Abstract: Introduction: Improvement of maternal healthcare of pregnant women at the grassroots level has necessitated the need to access and utilize primary health care (PHC) facilities. In spite of the benefits that are accrued to accessibility and utilization of such facilities, exploratory survey has revealed persistent underutilization of the facilities. Previous studies mainly focused on demographic, economic and some social factors, with little concentration on illiteracy, societal inspiration and cultural belief, particularly among pregnant women. This study therefore, examined influence of socio-cultural related factors on utilization of PHC facilities among pregnant women in Iwo Local Government Area (LGA), Osun State, Nigeria.