Experimental three-phase hydrate equilibrium data (aqueous liquid solution, vapor, and incipient solid hydrate) for methane hydrates in aqueous solutions of ethylene glycol and sodium chloride are presented. The data are obtained in the temperature range of (262 to 282) K and pressure range of (2.1 to 9.5) MPa. The incipient hydrate formation pressures are also calculated using the recently developed equation-of-state method of Clarke and Bishnoi. The computed results are compared with the experimental data.