Aim: The aim of the present study was to assess the association between RDW and mortality in children admitted in pediatric intensive care unit (PICU). Methods: The study was conducted in the department of Pediatric medicine, Sir Padampat mother and child health institute (SPMCHI) and advanced hematology laboratory, SMS medical College, Jaipur from October 2018 to April 2019. 170 patients were included in the study. All the patients who were admitted in PICU of SPMCHI hospital, SMS medical college consecutively in the above said time period were taken as subjects in this study, after screening for inclusion and exclusion criteria. Results: Total 170 children admitted in ICU ranged from 1month to 17 years, Majority of subjects belonged to age group 1month-5 years (36.4%), followed by 5-10 year and rest was age group of 10-18 years (30.7%). Out of 170 children, total number of males was 109(64.2%) and number of females was 61(35.8%). Among age group 1m-5y total 49(79%) were having haemoglobin in range of 9-11g/dl, 11 (17.7%) were having haemoglobin in range of 11-13g/dl, 2(3.3%) were having haemoglobin more than 13g/dl. In age group 5-10y total 39(69.6%) were having haemoglobin in range of 9-11g/dl, 13 (23.2%) were having haemoglobin in range of 11-13g/dl, 4 (7.1%) were having haemoglobin more than 13g/dl. Among age group 10-18y total 36 (69.2%) were having haemoglobin in range of 9-11g/dl, 13 (25%) were having haemoglobin in range of 11- 13g/dl, 3 (5.8%) were having haemoglobin more than 13g/dl. Conclusion: CRP in our study did not correlate with mortality, hence to conclude in resource poor setting where parameter for predicting mortality in critical care are not readily available, RDW which can be measured easily by coulter counter can be used as a predictor of mortality.