[en] Doublet electronic states of the H₂S⁺ ion, within the C _s as well as C _2v symmetries, were studied using the CASSCF and CASPT2 methods in conjunction with an ANO basis. For the three lowest-lying C _2v (1²B₁ 1²A₁ and 1²B₂) states, the CAS (CASSCF and CASPT2) calculation results (geometries, frequencies, and adiabatic excitation energies (T ₀)) are similar to those of the previous MRD-CI and MRCI calculations. We consider that the previous assignment of the B state to 1²B₂ be inappropriate since the calculated T ₀ values for 1²B₂ are about 1 eV smaller than the experimental T ₀ value for the B state. The potential energy surfaces (PESs) of the three lowest-lying C _s (1²A', 1²A', and 2²A') states were explored by locating and characterizing stationary points and by calculating minimum energy curves E(θ) (θ = < HSH). In the 1²A' PES there is a minimum M0. In the 1²A' PES, there are the global minimum M1, a local minimum M2, and a first-order saddle point TS connecting M1 and M2. M0, M1, and M2 are identified with the 1²B₁, 1²A₁, and 1²B₂ C _2v minima, respectively, while TS has a C _s geometry. The CASSCF and CASPT2 geometries and CASSCF frequencies for M0 (1²A') and M1 (1²A') are in reasonable agreement with the experimental data for the X and A states of the H₂S⁺ ion, respectively. The CASPT2 relative energy value of 2.38 eV for M1 (to M0) is in good agreement with the experimental T ₀ value of 2.31 eV for the A state. We assign the A state to 1²A' (M1). The local minimum M2 in the 1²A' PES is not involved in any adiabatic excitation process of the H₂S⁺ ion. In the 2²A' PES, a minimum M3 was located at a C _2v geometry at the CASPT2 level. The CASPT2 relative energy value of 4.19 eV for M3 (to M0) is quite close to the experimental T ₀ value of 4.31 eV for the B state, and we then assign the B state to 2²A' (M3)