This dataset supports the article entitled 'A High-Speed Design Methodology for Inductive Coupling Links in 3D-ICs' accepted for publication in Design, Automation & Test in Europe Conference & Exhibition (DATE), Dresden, 2018. Data Supporting Figures: Fig. 4 - (a) Inductance and (b) Resistance extraction accuracy as do varies (n=8, w=s=1um, f=1GHz). Fig. 5 - Mutual inductance extraction accuracy as n varies (do=300um, w=1.5um, s=1um for both coils). Fig. 6 - Accuracy comparison between COIL-3D and approach [8] for 50 randomly generated ICL geometries. Fig. 7 - Optimisation search effectiveness (when maximising ndat) for COIL-3D and existing approaches.