It is well known that certain cancers have shown clusteringin educational and socioeconomic groups, but recent comprehensive data on clustering by education are limited. We determined standardized incidence ratios (SIRs), adjusted for several variables, for cancer among men and women in six educational groups based on the Swedish Family-Cancer Database. People were identified with a certain educational background in the census of year 1970; the comparison group was the largest group, those with 50%, for stomach cancer in both genders and for cervical and anal cancer in women.