Paranoid schizophrenia incidence was analysed on the grounds of data from routine statistical records of mental hospitals in Poland. This diagnosis was made in 72% of first admissions for schizophrenia. Regional differences were found in this diagnosis frequency. Registered incidence of paranoid schizophrenia turned out to be higher in female patients. Early onset was more frequent in men, while late onset – in women. Indirect indices suggest that premorbid adjustment level of these patients was lower than that in the general population.