This paper presents new absolute measurements of the thermal conductivity of aqueous sodium chloride solutions with the transient coated-hot-wire technique. The data cover the range 295-365 K at pressures slightly above the vapor pressures and a concentration range of 0-6 mol kg(-1), The instrument is;able to measure the thermal conductivity with a precision and reproducibility better than +/- 0.2%, and a comparison of the present results with data available in the literature indicates that the accuracy of the-present data is better than +/- 0.5%. An empirical correlation that reproduces the data within the claimed accuracy is given.