Nigeria's high maternal mortality has been attributed to poor utilization of obstetric care services to handle complications of pregnancy and childbirth. But how available are standard emergency obstetric care services? This facility based cross sectional study assessed the availability and accessibility of emergency obstetric care services in Oyo State, Nigeria. Using a multi-stage sampling technique, 61 primary and 10 secondary health care facilities were selected. Data was collected using a structured questionnaire from the heads of the maternity units. Spatial mapping of the facilities was also produced. Results showed availability of comprehensive emergency obstetric care (CEmOC) facilities (0-3.9/500,000 population) was adequate, however a gross lack of basic emergency obstetric care (BEmOC) facilities (0-5.4/500,000 population) was observed, where available, they were clustered in the urban settlements. Prompt action needs to be taken to upgrade basic emergency obstetric care facilities accessible to the larger rural population dwellers to improve maternal health indices. Les résultats ont montré la disponibilité des soins obstétricaux d'urgence complets (SOU) installations (0 à 3,9/500 000 habitants) était suffisante, mais un manque flagrant de soins obstétricaux d'urgence de base (BEmONC) installations (0 à 5,4/500 000 habitants) a été observée, le cas échéant, ils ont été regroupés dans les agglomérations urbaines. Une action rapide doit être prise pour mettre à niveau des établissements de soins obstétricaux d'urgence de base accessibles aux plus grandes populations rurales les habitants pour améliorer les indices de santé maternelle. (Afr J Reprod Health 2016; 20[1]: 88-97).