# Texas State Highway 80

State Highway 80 (SH 80) is a state highway in the U.S. state of Texas that runs 93 miles (150 km) from Karnes City to San Marcos.

## History

The original highway was designated on August 21, 1923 from San Marcos to Luling, replacing most of SH 29A (the rest of SH 29A was cancelled). On October 12, 1925, SH 80 was extended to Wimberley, but this did not take effect until January 1, 1926. On April 6, 1932, SH 80 had a planned extension south to Nixon designated. On February 13, 1934, SH 80 was extended west to south of Blanco. On July 17, 1934, it was rerouted to end in Refugio over part of SH 29. This change was undone on January 19, 1935. On July 15, 1935, the section west of Wimberley was cancelled. On September 22, 1936, SH 80 was extended to Karnes City, replacing a portion of SH 112. On September 26, 1939, SH 80 was extended southwest to the Atascosa–Karnes county line, replacing SH 312. On February 20, 1940, the section from Karnes City to the Atascosa–Karnes county line was cancelled. On March 26, 1942, the section from Wimberley to San Marcos was transferred to Ranch to Market Road 12. On December 4, 1952, SH 80 was extended over old US 181 to new US 181. On June 21, 1990, this extension was cancelled, as it became part of Business US 181. On June 24, 2010, RM 12 was shifted to an alignment south of San Marcos, and the SH 80 designation was extended through the city to a terminus with RM 12 west of the city. On January 26, 2017, the section of SH 80 from RM 12 to Loop 82 was removed from the state highway system and was given to the city of San Marcos.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| Karnes | Karnes City | 0.0– 1.4 | 0.0– 2.3 | Bus. US 181 (Calvert Avenue) / SH 123 south (Badger Drive) – Kenedy | Southern terminus; south end of SH 123 concurrency |
| Karnes | Karnes City | 1.9 | 3.1 | SH 123 north (Badger Drive) – Stockdale | North end of SH 123 concurrency |
| Karnes | ​ | 6.6 | 10.6 | FM 792 | |
| Karnes | Helena | 8.0 | 12.9 | FM 81 – Runge | |
| Karnes | ​ | 11.7 | 18.8 | FM 1354 | |
| Karnes | ​ | 14.9 | 24.0 | FM 627 – Ecleto | |
| Karnes | Gillett | 20.5 | 33.0 | Spur 190 to FM 887 | |
| Karnes | Gillett | 20.7 | 33.3 | SH 119 – Stockdale, Yorktown | |
| Wilson | No major junctions | No major junctions | No major junctions | No major junctions | No major junctions |
| Gonzales | Nixon | 30.8 | 49.6 | US 87 / SH 97 south (Central Avenue) – Stockdale, Cuero | South end of SH 97 concurrency |
| Gonzales | Nixon | 31.0 | 49.9 | FM 1681 | |
| Gonzales | Leesville | 33.0 | 53.1 | FM 1117 north – Seguin | |
| Gonzales | Leesville | 35.0 | 56.3 | SH 97 north – Gonzales | North end of SH 97 concurrency |
| Gonzales | Leesville | 40.6 | 65.3 | FM 1682 | |
| Gonzales | Leesville | 47.5 | 76.4 | FM 466 east – Cost | |
| Gonzales | Belmont | 47.5 | 76.4 | FM 466 west – Seguin | |
| Gonzales | Belmont | 49.7 | 80.0 | US 90 Alt. – Seguin, Gonzales | |
| Guadalupe | ​ | 57.4 | 92.4 | FM 1150 | |
| Guadalupe | Luling | 58.6– 58.7 | 94.3– 94.5 | I-10 – Seguin, San Antonio, Schulenburg, Houston | I-10 exit 628 |
| Caldwell | Luling | 60.9 | 98.0 | US 90 / US 183 south (Pierce Street) | South end of US 183 concurrency |
| Caldwell | Luling | 61.1 | 98.3 | US 183 north (Magnolia Avenue) | North end of US 183 concurrency |
| Caldwell | Stairtown | 66.6 | 107.2 | FM 671 | |
| Caldwell | Fentress | 70.6 | 113.6 | FM 20 – Seguin, Lockhart | |
| Caldwell | ​ | 72.5– 72.6 | 116.7– 116.8 | SH 130 Toll (Pickle Parkway) – San Antonio, Seguin, Lockhart, Austin, Waco | |
| Caldwell | ​ | 80.6 | 129.7 | FM 1977 – Staples | |
| Caldwell | ​ | 77.8 | 125.2 | FM 1979 | |
| Caldwell | Martindale | 78.1 | 125.7 | SH 142 east – Lockhart | South end of SH 142 concurrency |
| Caldwell | Martindale | 80.2 | 129.1 | FM 1984 | |
| Hays | San Marcos | 82.7 | 133.1 | SH 21 east (Airport Highway) – Bastrop | South end of SH 21 concurrency |
| Hays | San Marcos | 83.7– 83.8 | 134.7– 134.9 | I-35 – San Antonio, Austin | I-35 exit 205; north end of SH 21/SH 142 concurrency |
| Hays | San Marcos | 85.1 | 137.0 | Loop 82 north (LBJ Drive) | |
| Hays | San Marcos | 85.2 | 137.1 | Loop 82 south (Guadalupe Street) | |
| Hays | San Marcos | 85.4 | 137.4 | FM 2439 (Hopkins Street) | |
| Hays | San Marcos | 88.3 | 142.1 | RM 12 – Wimberley | Northern terminus |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||