This paper mainly deals with solution equilibria between dioxovanadium(V) and the ligand methyliminodiacetic acid (MIDA) at different ionic strengths ranging from (0.1 to 0.9) mol.dm(-3) sodium perchlorate and a pH range of (1.00 to 2.50) at T = 298 K. VO(2)HL and VO(2)L(-) were the main species which were obtained oil the basis of the best fit at different ionic strengths. The application of a extended Debye-Hockel-type equation (EDH), specific ion interaction theory (SIT), and the parabolic model have been demonstrated for the representation of the ionic strength dependence of the stability and dissociation constants. Finally, the ionic strength dependence parameters were calculated on the basis of the aforementioned models, and the results were interpreted.