This Landolt-B rnstein volume IV/17 is a supplement to the volume IV/6 "Static Dielectric Constants of Pure Liquids and Binary Liquid Mixtures" and provides dielectric constant data published in the years 1991-2006. Included in this volume are static dielectric constants of pure liquids and binary liquid mixtures at different temperatures and saturation vapor pressures including liquid elements, inorganic liquids, organic liquids and their mixtures. Not all published data could be included in the printed version, but the electronic version contains all available data and references.