Introduction: Failed induction is associated with increased maternal and perinatal morbidity and increased need for operative deliveries. The pre-induction cervical status is the most important determinant of induction success. The traditional Bishop scoring system used in the assessment of cervical status has come under some criticism and newer methods such as sonographic cervical length measurements are being offered. Aim: To compare the accuracy of transvaginal sonographic cervical length with Bishop score in predicting outcome of induction of labour using misoprostol. Methods: This was a prospective study involving 133 women admitted at term and beyond for induction of labour with misoprostol at the Obstetrics Department of University of Ilorin Teaching Hospital between August 2016 and March 2017. Interviewer-administered, pretested proforma were used to collect data. Subjects had sonographic and digital cervical assessment for cervical length and Bishop score respectively. The pain score associated with each method was obtained. Induction outcomes were recorded. Successful induction of labour was defined as vaginal delivery occurring within 24 hours of onset of induction. Statistical analysis was done using SPSS (version 21.0; Chicago, Illinois, USA). Analyses were by t-test, Chi-square, Pearson’s correlation, receiver–operating characteristics (ROC) curves and multivariate logistic regression.