Covalently tethering photosensitizers to catalytically active 1T‐MoS₂ surfaces holds great promise for the solar‐driven hydrogen evolution reaction (HER). Herein, we report the preparation of two new Ru^II‐complex‐functionalized MoS₂ hybrids [Ru^II(bpy)₂(phen)]‐MoS₂ and [Ru^II(bpy)₂(py)Cl]‐MoS₂. The influence of covalent functionalization of chemically exfoliated 1T‐MoS₂ with coordinating ligands and Ru^II complexes on the HER activity and photo‐electrochemical performance of this dye‐sensitized system was studied systematically. We find that the photo‐electrochemical performance of this Ru^II‐complex‐sensitized MoS₂ system is highly dependent on the surface extent of photosensitizers and the catalytic activity of functionalized MoS₂. The latter was strongly affected by the number and the kind of functional groups. Our results underline the tunability of the photovoltage generation in this dye‐sensitized …