Vapor pressures of the ethylamine + water + lithium bromide (H 2 O:LiBr ) 2:1 mass) system and the ethylamine + water + lithium nitrate (H 2 O:LiNO 3 ) 2:1 mass) system were measured by a boiling point method at temperatures from 296.25 K to 318.25 K and at ethylamine concentrations from 4.8 to 59.4 mass %, and at temperatures from 296.35 K to 316.25 K and at ethylamine concentrations from 4.8 to 64.0 mass %, respectively. The experimental vapor pressure data for these ternary systems were fitted to an Antoine-type equation. The calculated values from these equations for vapor pressures of two ternary systems were in good agreement with the experimental vapor pressure data.