Incidence of non-Hodgkin's lymphoma in different employment categories was evaluated from the Swedish Cancer-Environment Registry, which links cancer incidence during 1961 to 1979 with occupational information from the 1960 census. New associations were found for men employed in shoemaking and shoe repair, porcelain and earthenware industries, education, and other white collar occupations. Several findings supported associations found in other countries, including excesses among woodworkers, -furniture makers, electric power plant workers, farmers, dairy workers, lorry drivers, and other land transport workers. Risks were not increased among chemists, chemical or rubber manufacturing workers, or petrochemical refinery workers. Caution must be used in drawing causal inferences from these linked registry data because information on exposure and duration of employment is not available. Nevertheless, this study has suggested new clues to possible occupational determinants of non-Hodgkin's lymphoma. (British Journal of Industrial Medicine 1993;50:79-84) During the past few decades, incidence of nonHodgkin's lymphoma has been increasing in many countries including Sweden, particularly among the elderly."q Although some of this increase may reflect diagnostic improvements, environmental and occupational factors have also been implicated.5 The relation of occupational exposures to non-Hodgkin's lymphoma has not been extensively evaluated,