Introduction: Congenital hip dysplasia is caused by abnormal development of the hip joint in early stages of fetal development. Uncemented total hip arthroplasty in adult patients with congenital hip dysplasia is commonly performed as end-stage treatment. Purpose: to evaluate the 3-15 year results of cementless total hip replacement in adult patients diagnosed with congenital hip dysplasia. Materials and Methods: A retrospective, single-center study was conducted comprising 151 patients diagnosed with congenital hip dysplasia and underwent cementless total hip replacement. Clinical evaluation tool used was Harris hip score (HHS combined with radiological examinations. p o k ’ l on w o b l bon lo n G n zon o mo l bon lo . Follow-up time was minimum 3 years (range 3-15 years). Results: HHS improved from a mean preoperative score of 49 ± 12 to 90 ± 9 at the final follow-up. There were 28 (18.5%) cases of femoral osteolysis and significantly more common in Gruens Zone 7 (p=0.032). 18 cases had acetabular bone loss (Paprosky 2A=nine cases, 2B=three cases, 2C=five cases, 3A=one case). Conclusions: Cementless hip arthroplasty in patients with congenital hip dysplasia proved its ability to restore patient quality of life for prolonged period of time. Complications are considered minimal according to similar studies published in the literature.