State Highway 80 or SH 80 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

 that runs 83 miles (133.6 km) from San Marcos

San Marcos, Texas

San Marcos is a city in the U.S. state of Texas, and is the seat of Hays County. Located within the metropolitan area, the city is located on the Interstate 35 corridor—between Austin and San Antonio....

 to Karnes City

Karnes City, Texas

Karnes City is a city in Karnes County, Texas, United States. The population was 3,457 at the 2000 census. It is the county seat of Karnes County. The town was named after Henry Karnes of the Texas Revolution. Karnes is some twenty-five miles south of Floresville on U.S...

. The original highway was designated in 1926 from San Marcos

San Marcos, Texas

San Marcos is a city in the U.S. state of Texas, and is the seat of Hays County. Located within the metropolitan area, the city is located on the Interstate 35 corridor—between Austin and San Antonio....

 to Luling

Luling, Texas

Luling is a city in Caldwell County, Texas, United States, along the San Marcos River. The population was 5,080 at the 2000 census. There is some debate as to how Luling got its name. Some say it was named for a Chinese railroad worker, others for a judge named Luling, or that it was the maiden...

, with a planned extension south to Nixon

Nixon, Texas

Nixon is a city in Gonzales and Wilson Counties in the U.S. state of Texas. The population was 2,186 at the 2000 census.The Wilson County portion of Nixon is part of the San Antonio Metropolitan Statistical Area.-Geography:...

. By 1928, SH 80 extended to Wimberley

Wimberley, Texas

Wimberley is a small town in Hays County, Texas, United States. Prior to its incorporation in May 2000, it was a census-designated place . The population was 2,626 at the 2010 census.-History:...

. This absorbed all or portions of previously designated SH 29A

State Highway 29 (Texas)

State Highway 29, or SH 29, runs from south of Menard east to SH 95 in Circleville via Mason, Llano, Burnet, Liberty Hill, and Georgetown in central Texas....

 and SH 21

State Highway 21 (Texas)

State Highway 21, or SH 21, runs from the Texas-Louisiana boundary east of San Augustine to San Marcos in east and central Texas.-History:...

. By 1940, the route to Nixon had been completed, with the highway extended further south to Karnes City over former SH 112

State Highway 112 (Texas)

State Highway 112 or SH 112 is a short segment highway that runs through the northern portions of Eastland County. The routing was previously designated as State Highway 69 in 1971. Vandalism to the road signage as a result of its numbering had reached epidemic proportion by 1989, driving a...

. In 1942, the section from Wimberley to San Marcos was transferred to Ranch to Market Road 12

Ranch to Market Road 12

Ranch to Market Road 12 is a roadway located in Hays and Travis counties of Texas.- History :RM 12 was originally formed from the segment of SH 80 from San Marcos to Wimberley in 1942. In 1945, it extended north to Dripping Springs. In 1963, it extended again, from Loop 82 to IH 35. In 1967, it...

.

Counties and junctions

County	Junction	Notes
Hays Hays County, Texas Hays County is a county located on the Edwards Plateau in the U.S. state of Texas. In 2010, its official population had reached 157,107. It is named for John Coffee Hays, a Texas Ranger and Mexican-American War officer. The seat of the county is San Marcos....	I-35 – San Marcos San Marcos, Texas San Marcos is a city in the U.S. state of Texas, and is the seat of Hays County. Located within the metropolitan area, the city is located on the Interstate 35 corridor—between Austin and San Antonio....
	SH 21 State Highway 21 (Texas) State Highway 21, or SH 21, runs from the Texas-Louisiana boundary east of San Augustine to San Marcos in east and central Texas.-History:...  – San Marcos
Caldwell Caldwell County, Texas Caldwell County is a county located in the U.S. state of Texas. It is part of the Austin-Round Rock metropolitan area. In 2000, the population was 32,194. Its county seat is Lockhart...	SH 142 – Martindale Martindale, Texas Martindale is a city in Caldwell County, Texas, United States. The population was 953 at the 2000 census.The city hosts an egg hunt each Easter...
	US 183 – Luling Luling, Texas Luling is a city in Caldwell County, Texas, United States, along the San Marcos River. The population was 5,080 at the 2000 census. There is some debate as to how Luling got its name. Some say it was named for a Chinese railroad worker, others for a judge named Luling, or that it was the maiden...
	US 90 – Luling
Guadalupe Guadalupe County, Texas Guadalupe County is a county located in the U.S. state of Texas. In 2000, its population was 89,023. It is named for the Guadalupe River. The seat of the county is Seguin. It was founded in 1846....	I-10 – Luling
Gonzales Gonzales County, Texas Gonzales County is a county located in the U.S. state of Texas. In 2000, its population was 18,628. It is named for its seat, the city of Gonzales.-History Timeline:* Paleo-Indians Hunter-gatherers, and later Coahuiltecan, Tonkawa, Karankawa...	Alt. US 90 – Belmont Belmont, Texas Belmont is an unincorporated community in Gonzales County, Texas, United States located on Alternate US 90 10 miles west of Gonzales, Texas. Although it is unincorporated, Belmont has a post office, with the ZIP code of 78604.-External links:...
	SH 97 State Highway 97 (Texas) State Highway 97 or SH 97 is a state highway running from Cotulla to Waelder in the U.S. state of Texas.-History:In 1926, SH 97 was originally planned as a route from Rio Grande City via Hebbronville and Tilden to end at Pleasanton,...  – Nixon Nixon, Texas Nixon is a city in Gonzales and Wilson Counties in the U.S. state of Texas. The population was 2,186 at the 2000 census.The Wilson County portion of Nixon is part of the San Antonio Metropolitan Statistical Area.-Geography:...
	US 87 – Nixon
Wilson Wilson County, Texas Wilson County is a county located in the U.S. state of Texas. In 2000, its population was 32,408. Its county seat is Floresville. The county is named after James Charles Wilson....	no intersections
Karnes Karnes County, Texas Karnes County is a county located in the U.S. state of Texas. As of 2000, the population was 15,446. Its county seat is Karnes City. Karnes County is named for Henry Karnes, a soldier in the Texas Revolution.-Geography:...	SH 119 State Highway 119 (Texas) State Highway 119 or SH 119 is a state highway in the U.S. state of Texas that runs from Stockdale to Alt. US 77 and U.S. Highway 183 north of Goliad.-Route description:...  – Gillett Gillett, Texas Gillett is an unincorporated community in Karnes County, Texas, United States. According to the Handbook of Texas, the community had an estimated population of 120 in 2000....
	SH 123 State Highway 123 (Texas) State Highway 123 is a north–south state highway that runs from Interstate 35 in San Marcos to US 181 in Karnes City. The route was initially proposed in 1928 and has had minimal changes to its routing since then.-Route description:...  at Karnes City Karnes City, Texas Karnes City is a city in Karnes County, Texas, United States. The population was 3,457 at the 2000 census. It is the county seat of Karnes County. The town was named after Henry Karnes of the Texas Revolution. Karnes is some twenty-five miles south of Floresville on U.S...