| Country: | HRV |
| Type: | D |
| Route: | 510 |
| Length Km: | 3 |
| Length Round: | 1 |
| Terminus A: | A9 in Umag interchange |
| Junction: | D200 in Plovanija |
| Terminus B: | Kaštel border crossing to Slovenia |
| Counties: | Istria |
D510 is a state road connecting the A9 motorway at the Umag interchange and D200 road to the Kaštel border crossing with Slovenia. The road is 3km (02miles) long.[1] The section of road between the Umag interchange with A9 motorway and the roundabout with D200 road is a single-carriageway, two-lane expressway.
The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske ceste, a state-owned company.[2]