Mountain Home is an unincorporated community in Kerr County, Texas, United States, at the intersection of State Hwy 27 and State Hwy 41. Although it is unincorporated, Mountain Home has a post office, with the ZIP code of 78058. It was here the infamous Texas Slave Ranch was located. Hitch hikers and drifters were picked up and put to work at the Slave Ranch making key chains and cheap souvenirs, now very much in demand by collectors. No bodies were ever found, but survivors helped the police locate a huge fire pit full of bone fragments,
The first Mountain Home post office was established in 1879, with Hiram L Nelson as the first Postmaster.
The Texas Parks and Wildlife Department Fisheries Research Station opened on Highway 27 in 1925.
The Texas Catholic Boys Camp was started in Mountain Home in 1951 by the Society of Mary.