In late 1876, Junction City won the designation of county seat from the unsuccessful and flood-prone settlement of Kimbleville.

Businessman Ernest Holekamp provided the city's first waterworks with a canal dug from the South Llano to Junction in 1895.

A dam was built in 1896 on the South Llano River to provide power and water to the city and irrigation to surrounding lands.

Denman and 152 others presented an incorporation petition to Kimble County Judge J.B. Randolph.

Highways include: According to the United States Census Bureau, Junction has a total area of 2.3 sq mi (6.0 km2), of which 0.01 square miles (0.02 km2), or 0.26%, is covered by water.

[10] The city is named for its location at the confluence of the North and South Llano Rivers.

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

[11] As of the 2020 United States census, there were 2,451 people, 1,091 households, and 661 families residing in the city.

Major celebrations in Junction include the Billie Sale and Parade held in August, and the annual Kimble Kow Kick, which takes place in September.

[8] The Kimble County Historical Museum contains documents, tools, and other relics from the days of early settlers and military artifacts.

Fisher Museum, housed in the Kimble County Library, contains an exact duplicate of the Washington, DC, office of the long-time congressman who represented the Junction area.

The city also has eight swimming pools, golf and tennis courts, and abundant hotel/motel options due mainly to its location along the heavily traveled Interstate 10 corridor.

The district supports an elementary, middle, and high school housed on a single campus at 1700 College Street.

The center is situated on a 410-acre (1.7 km2) campus, and offers a broad spectrum of programs in both the undergraduate and graduate disciplines.

A four-member police force and county sheriff officers serve the community.