Delaware 42 map courtesy of Google Earth
| Length |
| 12.69 miles |
| Other names |
| Blackiston Rd. Commerce St. Seven Hickories Rd. Main St. Fast Landing Rd. 2nd St. |
| Western terminus |
| Clayton (Blackiston), Kent County, JCT DE-6 |
| Eastern terminus |
| Dover (Leipsic), Kent County, JCT DE-9 |
| Municipalities traversed (W to E) (all in Kent County) |
| Blackiston Kenton Seven Hickories Moores Corner Cheswold Bishops Corner Leipsic |
| Road intersections |
| DE-6 DE-300 DE-15 (1.4 mile duplex) US-13 DE-9 |
| Notes |
| Route 42 overpasses the Route 1 turnpike, but there is no interchange (other than what appears to be a gated emergency/maintenance vehicle access roadway). |