State Highway 75
SH 75 highlighted in red
Route information
Maintained by TxDOT
Length	132.63 mi[1] (213.45 km)
Existed	1987–present
Major junctions
South end	Loop 336 in Conroe
Major intersections	US 190 / SH 30 in Huntsville I-45 / FM 1791 in Huntsville US 190 / SH 21 in Madisonville US 79 in Buffalo US 84 in Fairfield
North end	FM 246 near Streetman
Location
Country	United States
State	Texas
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← US 75 → SH 75A

State Highway 75 (SH 75) is a 132.63-mile-long (213.45 km) state highway in the U.S. state of Texas. It follows the former routing of U.S. Route 75 (US 75), which was supplanted by Interstate 45 south of Dallas, except in Dallas, where the former US 75 is now SH 310, and through Ferris, Palmer, Ennis, and Corsicana, where the old highway is signed as a business route of I-45. The route was designated in 1987.

The southern terminus of the route is in Conroe, where it merges into Interstate 45 at the southern side of Loop 336.^[2] The northern terminus is approximately three miles north of Streetman, in the southern section of Navarro County, where it becomes the east side frontage road for I-45.^[3]

SH 75 was previously designated on August 21, 1923 to replace SH 13A from Goodnight east to the Oklahoma state line.^[4] On May 19, 1924, the section from Goodnight to Jericho was cancelled.^[5] SH 75 was instead extended west to Washburn. By 1927 it was running concurrently with the newly designated U.S. Highway 66, and was cancelled on September 26, 1939. The current route was designated on January 28, 1987, replacing part of US 75 which was decommissioned south of Dallas.

North of Dallas, US 75 was rerouted onto Central Expressway, one of the first expressway projects in the United States, in the 1950s. Its original route from Richardson to Howe (south of Sherman) was redesignated as State Highway 5.

This section is missing mileposts for junctions. Please help by adding them.

County	Location	mi	km	Destinations	Notes
Montgomery	Conroe			I-45 / Loop 336 – Houston, Dallas
				FM 2854 west – Montgomery
				SH 105 – Montgomery, Cleveland
				Loop 336
				FM 3083 – Montgomery County Airport
				FM 830 – Lake Conroe
	Willis			FM 2432 east
				FM 1097 west – Lake Conroe	South end of FM 1097 overlap
				FM 1097 east	North end of FM 1097 overlap
Walker	New Waverly			FM 1375 west
				SH 150 east – Shepherd	South end of SH 150 overlap
				SH 150 west	North end of SH 150 overlap
	​			FM 2793 south
	​			FM 2296 north
	​			PR 40 – Huntsville State Park
	Huntsville			SH 19 – Trinity
				FM 1374 south
				US 190 east / SH 30 east – Livingston	South end of US 190/SH 30 overlap
				US 190 west / SH 30 west – Madisonville, College Station	North end of US 190/SH 30 overlap
				FM 2821 east
				I-45 / FM 1791 south
	​			FM 1696 west – Bedias	South end of FM 1696 overlap
	​			FM 1696 east	North end of FM 1696 overlap
Madison	​			Spur 67 east
	​			Spur 104 north
	Madisonville			SH 90 south – Navasota
				US 190 / SH 21 – Bryan, Crockett
	​			I-45
	​			SH OSR – Normangee, Midway
Leon	Leona			FM 977 – Flynn
	Centerville			SH 7 – Marquez, Crockett
	​			FM 1618 east
	​			FM 831 north – Oakwood
	​			FM 2539 south
	Buffalo			US 79 – Jewett, Oakwood
				SH 164 west – Groesbeck
Freestone	Dew			SH 179 west – Teague
				FM 489
	Fairfield			US 84 – Teague, Palestine
	​			FM 2547 north
	​			FM 833
	​			FM 1079 east
	​			Spur 114 west
	​			FM 3059 east / Loop 262 west – Streetman
	Streetman			FM 416 east – Richland Chambers Reservoir
				Loop 262 east – Streetman
	​			I-45 south / FM 246 – Dallas, Corsicana, Houston
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus