An investigation of CH stretching vibrations of benzene and toluene in their S₁ states have been carried out using UV-IR and stimulated Raman-UV double resonance spectroscopic methods. In benzene two CH stretching vibrations, namely ν′₂₀ and ν′₂, were observed, and in the case of toluene both aromatic and methyl CH stretching vibrations were observed. The ν′₂₀ of benzene is strongly coupled with ν′₈+ν′₁₄ via anharmonic resonance. The aromatic CH stretching vibrations in toluene also exhibit strong anharmonic resonance, leading to the appearance of a large number of bands in the 3000-3100 cm^-1 region. The observed frequencies of CH stretching vibrations in the S₁ state in both benzene and toluene are higher than the corresponding values in the S₀ state. On the other hand, methyl CH stretching vibrations in the S₁ state of toluene occur at a lower frequency than those in the S₀ state.