The organoplatinum complexes cover a huge field, as shown by a recent survey covering the crystallographic and structural data of over one thousand and five hundred examples. About 6.7% of these complexes exist as isomers and are summarized in this review. Included are distortion (96%) and cis–trans (4%) isomers. These are discussed in terms of the coordination about the platinum center and correlations are drawn between the donor atom, bond distance and interbond angles, with attention to any trans effect. Distortion isomers, differing by degree of distortion in Pt–L and L–Pt–L angles, are the most common. They are also spread over a wider range of oxidation states of platinum (zero, +1, +2 (most common) and +4), than cis–trans isomers (+2 only). The mean Pt–Pt bond distance elongate in the order: 2.600 Å (Pt(I)–Pt(I) < 2.685 Å (Pt(II)–Pt(II) < 2.703 Å (Pt(0)–Pt(0)) < 2.720 Å (Pt(I)–Pt(II)). Interestingly, that in the platinum chemistry distortion isomers by far prevails over the well-known cis–trans.