The cumulative risk of having had certain organs removed at operation has been estimated at different ages in the Oxford Record Linkage Study Area. A life-table method is used. The rates from which the life-tables were constructed were derived from deaths and operations reported to the Study in 1962-1965. The 10 organs most frequently removed, wholly or in part, were: tonsils, uterus, appendix, prostate, gall-bladder, stomach, thyroid, ovary, kidney and lower limb. The possible relevance of organ removal to the risk of contracting disease and to the interpretation of incidence and mortality rates for carcinoma of the cervix is indicated. © 1969.