Kentucky Route 21
|Maintained by KYTC|
|Length:||17.284 mi (27.816 km)|
|West end:||KY 52 near Paint Lick|
| I-75 in Berea
US 25 in Berea
US 421 in Bighill
|East end:||Jackson County line|
KY 21 begins at an intersection with KY 52 near Paint Lick in Madison County, heading southeast as two-lane undivided Paint Lick Road. The road passes through farmland with some trees and homes, curving south before heading back to the southeast. The route continues south and then southeast through more rural areas and comes to an intersection with the eastern terminus of KY 954. Following this, KY 21 heads east into wooded areas with some fields and residences, curving to the northeast. The road heads into Berea and enters commercial areas, curving east and coming to an interchange with I-75, at which point it is five lanes wide with a center left-turn lane. Past this interchange, the route becomes Chestnut Street and becomes a four-lane divided highway, intersecting US 25.
At this point, US 25 joins KY 21 for a concurrency and the two routes pass through residential areas as a two-lane undivided road. The road passes over a CSX railroad line and heads northeast into the downtown area of Berea before it passes more homes. KY 21 splits from US 25 by heading east on Prospect Street and immediately intersects KY 595. The road runs through more residential areas with some businesses and curves to the southeast. The route becomes Big Hill Road and curves east to leave Berea, heading through farmland with some homes and crossing KY 1617. KY 21 turns to the southeast and continues east through dense forests with some fields and residences. The route continues east to US 421 in Bighill, where it turns south to form a short concurrency with that route on McKee Road before heading east on Owsley Fork Road. KY 21 passes through more farmland and woodland and winds southeast to its eastern terminus at the county line between Madison County and Jackson County.
The entire route is in Madison County.
|||6.176||9.939||KY 954 west (Cartersville Road) – Cartersville, Maywoods|
|Berea||8.596||13.834||I-75 – Lexington, Knoxville||I-75 exit 76|
|9.115||14.669||US 25 south (Mt. Vernon Road)||West end of US 25 overlap|
|10.062||16.193||US 25 north (Chestnut Street)||East end of US 25 overlap|
|10.098||16.251||KY 595 (Scaffold Cane Road)|
|12.013||19.333||KY 1617 (Blue Lick Road / Gabbardtown Road)|
|Bighill||15.143||24.370||US 421 north||West end of US 421 overlap|
|15.308||24.636||US 421 south||East end of US 421 overlap|
|||17.284||27.816||Jackson County line|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- "Kentucky Transportation Cabinet - Division of Planning - Highway Information System Official Milepoint Route Log Extract". Retrieved 2007-06-13.
- Google (February 24, 2013). "overview of Kentucky Route 21" (Map). Google Maps. Google. Retrieved February 24, 2013.