This is part 3 of a series of contributions by the critical properties group of the IUPAC Commission I.2 on Thermodynamics, Subcommittee on Thermodynamic Data. It presents all known experimental data for the critical constants of aromatic hydrocarbons, which have been divided into four families : normal alkylbenzenes (5 compounds, C-6-C-10); other alkylbenzenes (13 compounds, C-8-C-12); polyphenyls (5 compounds, C-12-C-18); and condensed polycyclics (7 compounds, C-9-C-14) Recommendations are given together with uncertainties. Critical temperatures have been converted to ITS-90.