Two new crystalline compounds of l-cysteine have been obtained: bis-l-cysteinium sulfate (l-CysH)2SO4 (I) and l-cysteinium methanesulfonate (l-CysH)CH3SO3 (II). Both crystal structures belong to the orthorhombic space group P212121. They consist of one formula unit in the asymmetric unit. Structures are stabilized due to hydrogen bonds, which are mainly of type O–H···O and N–H···O. The shortest are hydrogen bonds O–H···O between l-cysteinium cations and sulfate anion with the O···O distances of 2.567(4) Å and 2.534(4) Å in (I) and l-cysteinium cation and methanesulfonate anion with the O···O distance of 2.577(3) Å in (II). Infrared spectra were registered and discussed.