Viral hepatitis is the most frequent occupational disease among medical workers in Poland. It has been estimated on 72% of all work-related infection diseases diagnosed in the year 2001, and was hepatitis C. The aim of the study was to estimate incidence of viral hepatitis type C among medical workers in Silesian voivodeship in years 1996 to 2003. The source of our data was standardized documents of occupational diseases collected in sanitary-epidemiological centers in the voivodeship. The highest incidence was reported among auxiliary workers (48/10,000) and laboratory staff (46/10,000). The smallest incidence of hepatitis type C was achieved for nurses and midwives (18/10,000). Obtained results revealed a large county-to-county variation in HCV incidence and simultanously increase of incidence.