The city lies in a broad valley south of Danville, and just north of the border between Boyle and Lincoln counties. Much of Junction City is concentrated along Shelby Street between the Cincinnati Southern tracks on the west and U.S. Route 127 on the east. The part of town east of US 127 is known as "Shelby City." Kentucky Route 37 and Kentucky Route 300 intersect in northwestern Junction City.
The city lies in a broad valley south of Danville, and just north of the border between Boyle and Lincoln counties. Much of Junction City is concentrated along Shelby Street between the Cincinnati Southern tracks on the west and US Route 127 on the east. The part of town east of US 127 is known as "Shelby City." Kentucky Route 37 and Kentucky Route 300 intersect in northwestern Junction City