A retrospective analysis of the height, weight and certain biochemical data from the Rangiora Diabetic Survey is presented. In this survey 93 percent of the 2670 adult Europeans in Rangiora were studied. A high prevalence of obesity was found with 31 percent of the men and 46 percent of the women being greater than 20 percent above their ideal body weight. More than half the women aged 50 years and over were obese by the criteria used. The peak prevalence of obesity was in the seventh decade for women and in the eighth and ninth decades for men. There were significant increases in serum uric acid in obese men and women in each age decade. A surprise finding in the obese men was the increase in plasma protein levels but this did not occur in the obese women. Both men and women had a trend towards higher blood sugars when obese.