Interstate 37, TexasRoads of the Mid-South & West > Highways of the State of Texas > Interstate 37, Texas

Interstate 37

Interstate 37 is a north-south interstate in Southeastern Texas. It runs from Interstate 35/U.S. Rt. 281, at San Antonio, to U.S. Rt. 181/Texas State Route 35, at Corpus Christi. This highway is exactly 143 miles long.

In Texas, I-37 is multi-plexed

I-37 is multi-plexed with...

...U.S. Rt. 281, at San Antonio.
...U.S. Rt. 281, from near Pleasanton to near Alice.
...U.S. Rt. 77, from near Sinton to Corpus Christi.

Interstate 37 crosses the following interstates in the State of Texas.

Interstate 35, at San Antonio.
Interstate 10, at San Antonio.
Interstate 410, at San Antonio.
Interstate 69E, at Corpus Christi.

There are no branches of I-37 in Texas.


A guide marker along U.S. Rt. 181.
Photo from: Paul Dienhart

A guide marker in San Antonio.
Photo from: Paul Dienhart

13 September 2015
Shield at the top of the page from: Paul Dienhart