Introduction: Oscillometry reference equations have been calculated using various devices and protocols in different countries. Therefore, applicability of these equations to different populations is challenging. Just one study has reported impulse oscillometry (IOS) reference values in Turkish children, and moreover just in preschool children. We aimed to determine IOS reference values for Turkish children aged three to nine years. Methods: We enrolled subjects without chronic respiratory disease aged 3-8 years who presented to Celal Bayar University Hospital Department of Pediatrics for non-respiratory reasons in this cross-sectional study. All subjects had IOS measurements with the Jaeger MS-IOS device. Mean values of the three measurements for resistance (R _rs) and reactance (X _rs) at 5, 10, 15 and 20 Hz, the area under the curve of X (AX) and the resonant frequency (f _res) were recorded. Results: A total of 245 children (111 boys) aged 3.06 to 8.53 years were enrolled. Mean values of R and X at 5, 10, 15 and 20 Hz, AX and f _res did not differ significantly between boys and girls. Multivariable linear regression analysis showed that in girls height was the sole determinant of R _rs5, X _rs10, X _rs15, and AX while height and weight were significant determinants of R _rs10, R _rs15, and R _rs20. In boys, height was the sole determinant of R _rs5, R _rs10, R _rs15, R _rs20, R _rs5-20, X _rs10, X _rs15, X _rs20, and AX. Conclusions: These results, which provide the IOS reference equations for normal Turkish children aged three to nine years, will be valuable in the evaluation of airway dynamics in health and disease states.