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We investigate the altermagnetic properties of strongly-correlated transition metal oxides considering the family of the quasi two-dimensional A 2 BO 4 and three-dimensional ABO 3. As a test study, we analyze the Mott insulators Ca 2 RuO 4 and YVO 3. In both cases, the orbital physics is extremely relevant in the t 2 g subsector with the presence of an orbital-selective Mott physics in the first case and of a robust orbital-order in the second case. Using first-principles calculations, we show the presence of an orbital-selective altermagnetism in the case of Ca 2 RuO 4. In the case of YVO 3 , we study the altermagnetism as a function of the magnetic ordering and of the Coulomb repulsion U. We find that the altermagnetism is present in all magnetic orders with the symmetries of the Brillouin zone depending on the magnetic order. Finally, the Coulomb repulsion enhances the non-relativistic spin-splitting making the strongly-correlated systems an exciting playground for the study of the altermagnetism. [ABSTRACT FROM AUTHOR]