Texas State Highway 80

State Highway 80
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Route information
Maintained by TxDOT
Length:	86.31 mi (138.91 km)
Existed:	1926 – present
Major junctions
South end:	SH 123 at Karnes City
	US 87 in Nixon Alt. US 90 I-10 US 90 / US 183 in Luling SH 130 Toll I-35 in San Marcos
North end:	RM 12
Highway system
Highways in Texas Interstate US State Toll Loops Spurs Park Rec FM ← SH 79 SH 81 →

State Highway 80 (SH 80) is a state highway in the U.S. state of Texas that runs 83 miles (134 km) from Karnes City to San Marcos.

History

The original highway was designated in 1926 from San Marcos to Luling. By 1928, SH 80 extended to Wimberley. By 1933, SH 80 had a planned extension south to Nixon. This absorbed all or portions of previously designated SH 29A and SH 21. By 1940, the route to Nixon had been completed, with the highway extended further south to Karnes City over former SH 112. In 1942, the section from Wimberley to San Marcos was transferred to Ranch to Market Road 12.

In 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.

Major intersections

County	Location	mi	km	Destinations	Notes
Karnes	Karnes City			Bus. US 181 (E. Calvert Ave.) / SH 123 south (S. Badger Dr.) – Kenedy	Southern terminus; south end of SH 123 concurrency
				SH 123 north (N. Badger Dr.) – Stockdale	North end of SH 123 concurrency
	​			FM 792
	Helena			FM 81 – Runge
	​			FM 1354
	​			FM 627 – Ecleto
	Gillett			Spur 190 to FM 887
				SH 119 – Stockdale, Yorktown
Wilson	No major junctions
Gonzales	Nixon			US 87 / SH 97 south (Central Ave.) – Stockdale, Cuero	South end of SH 97 concurrency
				FM 1681
	​			FM 1117
	​			SH 97 north – Gonzales	North end of SH 97 concurrency
	Leesville			FM 1682
	​			FM 466
	Belmont			Alt. US 90 – Seguin, Gonzales
Guadalupe	​			FM 1150
	Luling			I-10 – San Antonio, Houston	I-10 exit 628.
Caldwell				US 90 / US 183 south (E. Pierce St.)	South end of US 183 concurrency
				US 183 north (N. Magnolia Ave.)	North end of US 183 concurrency
	Stairtown			FM 671
	Fentress			FM 20
	​			SH 130 Toll – Seguin, Austin
	​			FM 1977
	​			FM 1979
	Martindale			SH 142 east – Lockhart	South end of SH 142 concurrency
				FM 1984
Hays	San Marcos			SH 21 east (Airport Hwy.) – Bastrop	South end of SH 21 concurrency
				I-35 – San Antonio, Austin	I-35 exit 205; north end of SH 21/SH 142 concurrency.
				Loop 82 north (N. LBJ Dr.)
				Loop 82 south (N. Guadalupe St.)
				FM 2439 (W. Hopkins St.)
	​			RM 12 – Wimberley	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus