- Southern Terminus:
- Milford Harrington Highway (DE 14) in Milford
- Northern Terminus:
- Summit Bridge Road (DE 896/DE 71) in Middletown
- 57.05 miles
- Kent, New Castle
DE 15 is a north/south route through the northern half of Delaware. It begins at Milford Harrington Highway (DE 14) in Milford and runs north, zigzagging its way through the state. In most places, it is a two-lane undivided road, and it has a number of multiplexes along the way. It eventually ends at Summit Bridge Road (DE 896/DE 71) just south of the Summit Bridge.