| Country: | HRV |
| Type: | D |
| Route: | 523 |
| Length Km: | 2.9 |
| Length Round: | 1 |
| Terminus A: | D501 in Križišće |
| Terminus B: | D8 and D102 near Šmrika |
| Counties: | Primorje-Gorski Kotar |
D523 is a state road connecting D501 state road and D8 / D102 state roads. The road is only 2.9 km long.[1]
This and all other state roads in Croatia are managed and maintained by Hrvatske ceste, state owned company.[2]