Interstate 20 in Texas
| I-20 highlighted in red | ||||
| Route information | ||||
| Maintained by TxDOT | ||||
| Length | 636.08 mi (1,023.67 km) | |||
| Existed | 1959–present | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end | I-10 in Reeves County | |||
| 
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| East end | I-20 near Greenwood, LA | |||
| Location | ||||
| Country | United States | |||
| State | Texas | |||
| Counties | Reeves, Ward, Crane, Ector, Midland, Martin, Howard, Mitchell, Nolan, Taylor, Callahan, Eastland, Erath, Palo Pinto, Parker, Tarrant, Dallas, Kaufman, Van Zandt, Smith, Gregg, Harrison | |||
| Highway system | ||||
| 
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Interstate 20 in Texas (I-20) is a major east–west Interstate Highway in the Southern United States, running east from a junction with I-10 east of Kent, Texas, through the Dallas–Fort Worth metroplex to the Louisiana state line near Waskom, Texas. The original distance of I-20 was 647 miles (1,041 km) from I-10 to the Louisiana state line, reduced to the current distance of 636 miles (1,024 km) with the rerouting of I-20 in the 1980s and 1990s. I-20 is known as the Ronald Reagan Memorial Highway within the Dallas–Fort Worth metroplex.