Serum vitamin B12, folic acid, ferritin and haematological variables were investigated in six hundred and seven women from 12 villages of 3 districts namely Chumpae, Srichumpu and Pupaman of Khon Kaen province, Northeast Thailand within the age range of 15-45 years. The cut-off point of haemoglobin concentration < 12 g/dl was applied for defining the normal and anaemic group (17.3%). The result showed that the concentration of ferritin, folic acid and vitamin B12 in the anaemic group were less than that of the normal group. Forty six out of 607 women or 7.6 per cent were found to be undernourished and 27.2 per cent of females were overnourished. The prevalence of deficiencies of vitamin B12, folic acid and ferritin were 6.3 per cent, 4.3 per cent and 12.5 per cent respectively.