In recent years, nations over the world were looking for alternative energy sources to reduce global warming caused by traditional fossil fuel burning. Renewable energy sources like wind power have great opportunities in this direction, because of low pollution. The offshore wind turbine (OWT) structures are frequently subjected to dynamic loads during operation. Hence, knowledge of their dynamic characteristics such as their natural frequencies, is essential to avoid damaging resonances. In this study, the Abaqus finite element program is used to calculate the natural frequency of a jacket-type offshore wind turbine supporting structure. During the analysis, the nonlinear behavior has also been considered. Four models: the finite element model, the hybrid finite-infinite element model with the soil material simulated by infinite element, the soil spring model adopting the soil equation proposed by the American Petroleum Institute, and the equivalent soil spring model were utilized in this study. The nonlinear behavior of the soil-pile interaction and the natural frequency of the OWT structure were thoroughly analyzed.