Objective. To estimate the prevalence of sacroiliac dysfunction during pregnancy in Egypt. Materials and Methods. This was a cross-sectional observational study recruiting 861 pregnant women who attended the Obstetrics and Gynecology Department's outpatient clinic at Suez Canal University Hospitals from August 2016 to March 2020. Pain provocation tests were performed, including distraction test, Patrick Faber test, posterior pain provocation test, compression test, and active straight leg raising test. The reference criteria of three or more positive pain-provoking tests have high validity for the diagnosis. The primary outcome measurement was the prevalence of sacroiliac dysfunction during pregnancy. Results. 861 pregnant women were involved in this study, with 26.2 ± 6 years. The distraction test, Patrick Faber test, and posterior pain provocation test were the most positive tests (59.1%, 57.1%, and 51%, respectively). Three hundred twenty-four cases were found to have three or more positive pain provocation tests. The prevalence of sacroiliac dysfunction was 37.6%. Conclusions. Sacroiliac dysfunction commonly occurs among pregnant women in Egypt.