OBJECTIVES: The aim of the study is to show the utilization of hip-prosthesis implantations in Hungary according to age groups and geographical regions. METHODS: In this retrospective study the data derive from the financial database of the National Health Insurance Fund of Hungary and the database of the Hungarian Central Statistical Office. For the analysis we used the International Classification of Diseases (ICD) tenth revision and the surgical codes of the Hungarian Homogenous Disease Groups related to prosthesis implantations. The study includes all the hip implantations that occur for the first time in the year of 2002 as a one side primary prosthesis, regardless of the status of the opposite hip (such as the coxarthrosis, primary treatment of hip fractures or their prosthesis after changing the methods, other problems). The study does not include the implantation of hip prosthesis on the opposite side within one year, and the prosthesis implanted earlier but having been replaced because of any reasons. RESULTS: The total number of patients fulfilled the criteria mentioned above were 8019. The average number of patients with hip prosthesis (either hemi or total) per 10,000 populations was 7.90. According to age-groups: age 10-19: 0.03 case, age 20-29: 0.18 case, age 30-39: 1.01 case, age 40-49: 4.89 cases, age 50-59: 10.46 cases, age 60-69: 23.51 cases, age 70-79: 32.72 cases, aged over 80: 25.21 cases. The number of patients having prosthesis according to the geographical regions per 10,000 population: Central-Hungary: 8.72, Central-Transdanubia: 7.87, Western-Transdanubia: 8.35, Southern-Transdanubia: 8.86, Southern-Greatplane: 8.7, Northern-Hungary: 6.89, Northern-Greatplane: 5.69. CONCLUSION: We realized significant regional differences in the utilization of hip implantations. Further studies are needed to explore the causes and factors influencing the regional differences.