Objective: To investigate the accuracy of self-reported height of end-stage renal disease patients with measured height. Design: Patients reported their current height in an interview conducted by the principle investigator rather than a self-administered questionnaire. During a single visit, actual height was measured to the nearest centimeter, without shoes, using a stadiometer. Setting: Patients were recruited from the Northwest Kidney Center (Seattle, WA), Elliott Bay, Lake Washington, and Mount Rainier satellite facilities. Patients: A total of 180 patients were interviewed and measured. One hundred nine men and 71 women (age range, 29 to 87 years) participated in the study. Demographic data included age, sex, postdialysis weight, race, length of dialysis treatment, calcium, phosphorus, parathyroid hormone intact, alkaline phosphatase, aluminum, pertinent medications (phosphate binders, calcitriol), diagnosis, and brief medical history. Selection criteria included patients older than 25 years, patients receiving hemodialysis, patients of ambulatory status, and patients who agreed to participate in this study. Exclusion criteria included patients with bone cancer, patients who did not speak English, patients whose heights could not be accurately measured with a stadiometer (amputee of lower extremity), patients who were wheelchair or bed bound, and patients with kidney transplants for more than 1 year before rejection. results: The mean self-reported height was 1.7 ± 2.25 cm (95% Cl, +1.4 and +2.0) greater than current measured height. Differences in overestimation were influenced by sex. Men overestimated their height by a mean of 1.9 ± 2.09 cm and women by a mean of 1.4 ± 2.46 cm (P = .025). Results of our study are similar to those of previous studies that examined self-reporting bias in healthy subjects. Our study sample overestimated height; however, the mean difference in height was greater than that reported in previous studies from the general population. Conclusion: Our study sample may overestimate height to a greater extent than other populations studied because of the high occurrence of renal bone disease. Additionally, we did not find body mass index, age, length of dialysis treatment, diagnosis, and actual height influenced the ability to self-report height. Our findings indicate that self-reported height in the renal community should be interpreted with care because of the tendency to overestimate height, and actual measurement is needed for accuracy.