[3] Lexington, a cattle trading town, is approximately 40 miles (64 km) west of Bryan.

In 1850, residents changed the name of the settlement to Lexington to honor the location of the first battle of the American Revolution.

[5][6] According to the United States Census Bureau, the town has a total area of 1.2 square miles (3.1 km2), all land.

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[7] As of the 2020 United States census, 1,217 people, 492 households, and 367 families were residing in the town.

Calvin Trillin of The New Yorker said that while Lexington is not geographically in the Texas Hill Country, as it is located on ranch land, it "ethnically is."