Liquid-liquid equilibria and liquid-liquid-liquid equilibria were determined for ( water + cyclohexylamine + toluene), ( water + cyclohexylamine + propylbenzene), ( water + cyclohexylamine + heptane), and ( water + cyclohexylamine + octane) at temperatures of (298.15, 303.15, and 333.15) K at atmospheric pressure by photometric turbidity titration. The composition of conjugate phases was determined by gas-liquid chromatography or potentiometric titration and Karl Fischer titration. All systems show type I behavior since there is only one binary pair of partial miscible liquids. Surprisingly, the systems ( water + cyclohexylamine + heptane) and ( water + cyclohexylamine + octane) have a three-phase region in a limited temperature range. The data were predicted with the NRTL and the UNIQUAC models in comparison to the Elliott-Suresh-Donohue equation of state based on binary interaction parameters only.