Countries differ widely with respect to the level of labour income inequality among individuals of working age. Labour income inequality is shaped by differences in wage rates, hours worked and inactivity rates. Individual labour income inequality is the main driver of household market income inequality, with family formation as well as self-employment and capital income dispersion playing a smaller role. Household disposable income dispersion is lower in all OECD countries than household market income inequality, due to the redistributive effect of tax and transfer systems, but redistribution differs widely across countries. This paper maps income inequality for all OECD countries across various inequality dimensions and summarises them in inequality outcome diamonds. It also provides a cluster analysis that identifies groups of countries that share similar inequality patterns. Moins d'inegalites de revenu et plus de croissance – Ces deux objectifs sont-ils compatibles?: Partie 1. Cartographie des inegalites de revenu dans les pays de l'OCDE Les inegalites des revenus du travail entre les personnes en âge de travailler varient largement selon les pays. Elles refletent les ecarts de salaire, de nombre d‘heures ouvrees et de taux d‘inactivite. Ces inegalites sont le principal facteur d‘inegalite du revenu marchand des menages, la composition de la famille, l‘emploi independant et la repartition des revenus du capital jouant un moindre role. La repartition du revenu disponible des menages dans tous les pays de l‘OCDE est moins importante que l‘inegalite du revenu marchand des menages en raison de l‘effet redistributif de l‘impot et des systemes de transfert, mais cette redistribution est tres variable selon les pays. Ce document dresse une cartographie des inegalites de revenu dans tous les pays de l‘OCDE en distinguant les differentes composantes de revenus et en les synthetisant sous forme de figures en diamant rendant compte des resultats obtenus. Il presente en outre une analyse par clusters mettant en evidence les groupes de pays ayant en commun les memes structures d‘inegalite.Countries differ widely with respect to the level of labour income inequality among individuals of working age. Labour income inequality is shaped by differences in wage rates, hours worked and inactivity rates. Individual labour income inequality is the main driver of household market income inequality, with family formation as well as self-employment and capital income dispersion playing a smaller role. Household disposable income dispersion is lower in all OECD countries than household market income inequality, due to the redistributive effect of tax and transfer systems, but redistribution differs widely across countries. This paper maps income inequality for all OECD countries across various inequality dimensions and summarises them in inequality outcome diamonds. It also provides a cluster analysis that identifies groups of countries that share similar inequality patterns.