Hye is an unincorporated community in western Blanco County, Texas, United States. It lies along U.S. Route 290 west of the city of Johnson City, the county seat of Blanco County. Its elevation is 1,453 feet. Although Hye is unincorporated, it has a post office, with the ZIP code of 78635.Hiram G. Brown and his parents settled in the Rocky Creek area of Blanco County, circa 1872. He constructed a small store and house near the Pedernales River. Brown was appointed postmaster upon getting a post office established in his store on April 17, 1886. The post office was named Hye for him. The establishment of the post office drew other businesses to the area, eventually bringing in a grist mill and a cotton gin. In 1904, Brown erected a new building for the store and post office. Today, Hye Meadow Winery is located next door to the historic building on a ranch deeded back to 1845.In 1965, on the porch of the Hye post office, Lyndon B. Johnson swore in Lawrence F.