Prostate cancer is the second most common male cancer, most often diagnosed among men older than 65. Despite its frequency, only 10% of men die from this disease. With the advancement of dignostics this cancer can be detected in its early stages in an increasing number of men, but curative treatment isn't recommended for every patient due to possible complications and side effects which can undermine the quality of life. This research paper deals with the analysis of the prostate cancer incidence trend in Istarska County in Croatia, with the hypothesis that the incidence rates would grow in the time period from 2006 do 2015, and that the age-specific incidence rates would be highest in the oldest age groups. Data about diseased were provided by Croatian Cancer Registry, and data about population in Istarska County was taken from 2011 population census by Croatian Bureau of Statistics. The results largely confired the hypotheses, though the increase in incidence rates throughout the years wasn't linear. Age-specific incidence rates were highest in the age group 75-79 years, followed by the 85+ group. Still, the age-specific rates in all groups older than 65 were significantly higher than those in groups younger than 65. To conclude, the results greatly match the expectations, given the higher-quality diagnostics, increase in older population, and the ever greater prevalence of obesity and other known risk factors in the population.