Investigators arrived at the 17900 block of Timber Crossing Lane just after 7 a.m. and reported finding both women unresponsive with gunshot wounds. Officials said one woman was in her 50s and the second was in her 70s.
Deputies said the younger woman's husband found both victims.
Paramedics were called to the home, but both were pronounced dead at the scene.
HCSO did not elaborate on the fatal injuries that the woman sustained, but said it appears to have been a murder-suicide. An investigation is underway.